Off Highway Engineering - Lubrizol Special Edition - 8

correct fluid is of supreme importance. A recent survey
conducted by Lubrizol of off-highway machinery operators in
China revealed that each vehicle would typically experience
problems once a year—problems severe enough to warrant
taking the item out of service. Downtime, as a result of such
problems, averaged over 1.5 days per item of equipment,
representing a daily revenue loss of up to $800 (5200 Chinese
Renminbi). Crucially, when it came to wheel loaders and
excavators, misapplied fluids were a significant problem and
a key causal factor in the axle, gear, transmission and clutch
failures reported by between 36 and 50-plus percent of all
the operators questioned.
In its documentation series “Improving Component Durabil-
ity,” Caterpillar reports that among tracked vehicles the undercarriage
system, which also includes the wet brakes responsible
for steering and retarding the vehicle, is responsible for 50
percent of total machine maintenance costs, underlining the
importance of correct lubrication and operational procedures.
Payload: 400 tonnes
Larger-than-life haul trucks, beloved of every kid’s play set,
can carry as much as 400 tonnes at a time and are commensurately
powerful, with engines of 20 cylinders and over 2800
kW (4000 hp) in output. Unlike loaders and dozers, they tend
to have transmissions with up to seven forward speeds, rather
than three forward and three reverse, since their main task
is transporting heavy loads within the mine or quarry site. Yet
they, too, face many obstacles in their daily duty. While the
normal rolling resistance on flat, firm ground might be of the
order of 2 percent, a soft underfoot can push this as high as
30 percent. Add in the extra resistance of an upgrade of, say,
8 percent, and it is easy for the truck to stray into overload
territory as far as the loads on the bearings and transmission
are concerned.
Leading construction vehicle manufacturers agree that this
is an increasing risk with the recent tendency of site owners
to introduce steeper grades so as to reduce construction
costs; the company observes that such savings tend to
be outweighed by the shorter component life and increased
wheel group lifecycle costs on the machinery employed.
In these applications, the clutch is less heavily stressed
than with loaders. Even so, clutch failure is the second most
common reason for transmission removal, with the failure
itself often traced to slippage caused indirectly by contamination
in the oil. Once more this points to the paramount
importance of the lubricant in protecting the transmission
and ensuring its longevity. Yet, as with all modern computer-
8 LUBRIZOL DIGITAL MAGAZINE SEPTEMBER 7, 2011
controlled drivelines, the lubricants are
called upon to perform multiple tasks
ranging from launching, gearshifting,
steering, braking, brake cooling and
downhill retarding. A glance at the
specification of the Caterpillar 797F
mining truck (see box on page 11) will
show just how sophisticated today’s
off-highway vehicles have become.
Advances in
Clutch Design
One of the major advances in recent
years has been the move toward electronic,
rather than mechanical or hydraulic,
control of powershift transmissions
and clutches. The improvement
has come from the effective replacement
of the spring-loaded spool valves
(prone to sticking when there is small
debris in the oil) by electronic solenoids
offering proportional control of clutch
engagement pressure, clutch modulation
and torque converter lockup.
The fact that electronic systems
offer diagnostic and self-adjustment capabilities
means that clutch pressures
can be maintained precisely throughout
the life of the transmission, avoiding the
risk of damaging clutch slip that can
occur when conventional springs lose
their tension with age and repeated
flexing. This alone has contributed
materially to component lifespan and
reliability and to reducing the service
demands on heavyweight machinery.
In addition, the precise modulation of
clutch actions gives smoother gearshifts,
reducing the shock loads on the
remaining elements of the driveline.
Maintaining the
Complex Driveline
Given that most off-highway vehicles
are designed to haul heavy loads at low
speeds over relatively short distances,
the principal elements in their drive

Off Highway Engineering - Lubrizol Special Edition

Table of Contents for the Digital Edition of Off Highway Engineering - Lubrizol Special Edition

Off Highway Engineering - Lubrizol Special Edition
Contents
Lubrizol and SAE Team Up in China
Off-Highway Machinery’s Duty Cycle Challenges
‘I Feel the Earth Move Under My Feet’
Survey Offers Insight into China’s Off-Highway Fleet Managers
Thumbs Up: 3 Videos to Watch
Reader Survey: Tell Us What’s on Your Mind
Off Highway Engineering - Lubrizol Special Edition - Cover
Off Highway Engineering - Lubrizol Special Edition - Contents
Off Highway Engineering - Lubrizol Special Edition - Lubrizol and SAE Team Up in China
Off Highway Engineering - Lubrizol Special Edition - 3
Off Highway Engineering - Lubrizol Special Edition - 4
Off Highway Engineering - Lubrizol Special Edition - 5
Off Highway Engineering - Lubrizol Special Edition - Off-Highway Machinery’s Duty Cycle Challenges
Off Highway Engineering - Lubrizol Special Edition - 7
Off Highway Engineering - Lubrizol Special Edition - 8
Off Highway Engineering - Lubrizol Special Edition - 9
Off Highway Engineering - Lubrizol Special Edition - 10
Off Highway Engineering - Lubrizol Special Edition - 11
Off Highway Engineering - Lubrizol Special Edition - ‘I Feel the Earth Move Under My Feet’
Off Highway Engineering - Lubrizol Special Edition - 13
Off Highway Engineering - Lubrizol Special Edition - 14
Off Highway Engineering - Lubrizol Special Edition - 15
Off Highway Engineering - Lubrizol Special Edition - Survey Offers Insight into China’s Off-Highway Fleet Managers
Off Highway Engineering - Lubrizol Special Edition - 17
Off Highway Engineering - Lubrizol Special Edition - 18
Off Highway Engineering - Lubrizol Special Edition - 19
Off Highway Engineering - Lubrizol Special Edition - Thumbs Up: 3 Videos to Watch
Off Highway Engineering - Lubrizol Special Edition - Reader Survey: Tell Us What’s on Your Mind
Off Highway Engineering - Lubrizol Special Edition - survey
https://www.nxtbook.com/smg/sae/21AVE09
https://www.nxtbook.com/smg/sae/21AE09
https://www.nxtbook.com/smg/sae/21TOHE08
https://www.nxtbook.com/smg/sae/21AE08
https://www.nxtbook.com/smg/sae/21AVE07
https://www.nxtbook.com/smg/sae/21TOHE06
https://www.nxtbook.com/smg/sae/21AE06
https://www.nxtbook.com/smg/sae/21AE05
https://www.nxtbook.com/smg/sae/21AVE05
https://www.nxtbook.com/smg/sae/21TOHE04
https://www.nxtbook.com/smg/sae/21AE04
https://www.nxtbook.com/smg/sae/21AE03
https://www.nxtbook.com/smg/sae/21AVE03
https://www.nxtbook.com/smg/sae/21TOHE02
https://www.nxtbook.com/smg/sae/21AE02
https://www.nxtbook.com/nxtbooks/sae/ave_202101
https://www.nxtbook.com/nxtbooks/sae/20TOFHP12
https://www.nxtbook.com/nxtbooks/sae/20AUTP11
https://www.nxtbook.com/nxtbooks/sae/ave_202011
https://www.nxtbook.com/nxtbooks/sae/20TOFHP10
https://www.nxtbook.com/nxtbooks/sae/20AUTP10
https://www.nxtbook.com/nxtbooks/sae/ave_202009
https://www.nxtbook.com/nxtbooks/sae/20AUTP09
https://www.nxtbook.com/nxtbooks/sae/20AUTP08
https://www.nxtbook.com/nxtbooks/sae/20TOFHP08
https://www.nxtbook.com/nxtbooks/sae/ave_202007
https://www.nxtbook.com/nxtbooks/sae/20AUTP06
https://www.nxtbook.com/nxtbooks/sae/20TOFHP06
https://www.nxtbook.com/nxtbooks/sae/20AUTP05
https://www.nxtbook.com/nxtbooks/sae/ave_202005
https://www.nxtbook.com/nxtbooks/sae/20TOFHP04
https://www.nxtbook.com/nxtbooks/sae/20AUTP04
https://www.nxtbook.com/nxtbooks/sae/ave_202003
https://www.nxtbook.com/nxtbooks/sae/20AUTP03
https://www.nxtbook.com/nxtbooks/sae/20AUTP0102
https://www.nxtbook.com/nxtbooks/sae/20TOFHP02
https://www.nxtbook.com/nxtbooks/sae/ave_202001
https://www.nxtbook.com/nxtbooks/sae/19TOFHP12
https://www.nxtbook.com/nxtbooks/sae/ave_201911
https://www.nxtbook.com/nxtbooks/sae/19AUTP11
https://www.nxtbook.com/nxtbooks/sae/19TOFHP10
https://www.nxtbook.com/nxtbooks/sae/19AUTP10
https://www.nxtbook.com/nxtbooks/sae/ave_201909
https://www.nxtbook.com/nxtbooks/sae/19AUTP09
https://www.nxtbook.com/nxtbooks/sae/19TOFHP08
https://www.nxtbook.com/nxtbooks/sae/19AUTP08
https://www.nxtbook.com/nxtbooks/sae/ave_201907
https://www.nxtbook.com/nxtbooks/sae/19AUTP06
https://www.nxtbook.com/nxtbooks/sae/19TOFHP06
https://www.nxtbook.com/nxtbooks/sae/ave_201905
https://www.nxtbook.com/nxtbooks/sae/19AUTP05
https://www.nxtbook.com/nxtbooks/sae/19TOFHP04
https://www.nxtbook.com/nxtbooks/sae/19AUTP04
https://www.nxtbook.com/nxtbooks/sae/ave_201903
https://www.nxtbook.com/nxtbooks/sae/19AUTP03
https://www.nxtbook.com/nxtbooks/sae/19AUTP02
https://www.nxtbook.com/nxtbooks/sae/19TOFHP02
https://www.nxtbook.com/nxtbooks/sae/19AUTP01
https://www.nxtbook.com/nxtbooks/sae/ave_201901
https://www.nxtbook.com/nxtbooks/sae/18TOFHP12
https://www.nxtbook.com/nxtbooks/sae/18AUTP11
https://www.nxtbook.com/nxtbooks/sae/18MOMP11
https://www.nxtbook.com/nxtbooks/sae/18AUTP10
https://www.nxtbook.com/nxtbooks/sae/ave_201810
https://www.nxtbook.com/nxtbooks/sae/18TOFHP09
https://www.nxtbook.com/nxtbooks/sae/18AUTP09
https://www.nxtbook.com/nxtbooks/sae/18MOMP09
https://www.nxtbook.com/nxtbooks/sae/18TOFHP08
https://www.nxtbook.com/nxtbooks/sae/18AUTP08
https://www.nxtbook.com/nxtbooks/sae/ave_201808
https://www.nxtbook.com/nxtbooks/sae/18AUTP06
https://www.nxtbook.com/nxtbooks/sae/18TOFHP06
https://www.nxtbook.com/nxtbooks/sae/18AUTP05
https://www.nxtbook.com/nxtbooks/sae/ave_201805
https://www.nxtbook.com/nxtbooks/sae/18TOFHP04
https://www.nxtbook.com/nxtbooks/sae/18AUTP04
https://www.nxtbook.com/nxtbooks/sae/18MOMP04
https://www.nxtbook.com/nxtbooks/sae/ave_201803
https://www.nxtbook.com/nxtbooks/sae/18AUTP03
https://www.nxtbook.com/nxtbooks/sae/18TOFHP02
https://www.nxtbook.com/nxtbooks/sae/18AUTP02
https://www.nxtbook.com/nxtbooks/sae/18AUTP01
https://www.nxtbook.com/nxtbooks/sae/17TOFHP12
https://www.nxtbook.com/nxtbooks/sae/17AUTP11_supp
https://www.nxtbook.com/nxtbooks/sae/17AUTP11
https://www.nxtbook.com/nxtbooks/sae/17AUTP10
https://www.nxtbook.com/nxtbooks/sae/17TOFHP10
https://www.nxtbook.com/nxtbooks/sae/17AUTP09
https://www.nxtbook.com/nxtbooks/sae/17TOFHP08
https://www.nxtbook.com/nxtbooks/sae/17AUTP08
https://www.nxtbook.com/nxtbooks/sae/17TOFHP06
https://www.nxtbook.com/nxtbooks/sae/17AUTP06
https://www.nxtbook.com/nxtbooks/sae/17AUTP05
https://www.nxtbook.com/nxtbooks/sae/17TOFHP04
https://www.nxtbook.com/nxtbooks/sae/17AUTP04
https://www.nxtbook.com/nxtbooks/sae/17AUTP03
https://www.nxtbook.com/nxtbooks/sae/17TOFHP02
https://www.nxtbook.com/nxtbooks/sae/17AUTP02
https://www.nxtbook.com/nxtbooks/sae/17AUTP01
https://www.nxtbook.com/nxtbooks/sae/16OFHP12
https://www.nxtbook.com/nxtbooks/sae/16AUTP12
https://www.nxtbook.com/nxtbooks/sae/16AUTP11
https://www.nxtbook.com/nxtbooks/sae/16AUTP10
https://www.nxtbook.com/nxtbooks/sae/16OFHP10
https://www.nxtbook.com/nxtbooks/sae/16AUTP09
https://www.nxtbook.com/nxtbooks/sae/16OFHP08
https://www.nxtbook.com/nxtbooks/sae/16AUTP08
https://www.nxtbook.com/nxtbooks/sae/16AUTD07
https://www.nxtbook.com/nxtbooks/sae/16OFHP06
https://www.nxtbook.com/nxtbooks/sae/16AUTP06
https://www.nxtbook.com/nxtbooks/sae/16AUTD05
https://www.nxtbook.com/nxtbooks/sae/16AUTD04
https://www.nxtbook.com/nxtbooks/sae/16OFHP04
https://www.nxtbook.com/nxtbooks/sae/16AUTD03
https://www.nxtbook.com/nxtbooks/sae/16OFHP02
https://www.nxtbook.com/nxtbooks/sae/16AUTD02
https://www.nxtbook.com/nxtbooks/sae/16AUTD01
https://www.nxtbook.com/nxtbooks/sae/15AUTD12
https://www.nxtbook.com/nxtbooks/sae/15OFHP12
https://www.nxtbook.com/nxtbooks/sae/15AUTP11
https://www.nxtbook.com/nxtbooks/sae/15OFHP10
https://www.nxtbook.com/nxtbooks/sae/15AUTP10
https://www.nxtbook.com/nxtbooks/sae/15AUTP09
https://www.nxtbook.com/nxtbooks/sae/15AUTD08
https://www.nxtbook.com/nxtbooks/sae/15OFHP08
https://www.nxtbook.com/nxtbooks/sae/15AUTP07
https://www.nxtbook.com/nxtbooks/sae/15AUTP06
https://www.nxtbook.com/nxtbooks/sae/15OFHP06
https://www.nxtbook.com/nxtbooks/sae/15AUTD05
https://www.nxtbook.com/nxtbooks/sae/15OFHP04
https://www.nxtbook.com/nxtbooks/sae/15AUTP04
https://www.nxtbook.com/nxtbooks/sae/15AUTP03
https://www.nxtbook.com/nxtbooks/sae/15OFHP02
https://www.nxtbook.com/nxtbooks/sae/15AUTP02
https://www.nxtbook.com/nxtbooks/sae/15AUTD01
https://www.nxtbook.com/nxtbooks/sae/14OFHD12
https://www.nxtbook.com/nxtbooks/sae/14AUTD12
https://www.nxtbook.com/nxtbooks/sae/14VED11
https://www.nxtbook.com/nxtbooks/sae/14AERD11
https://www.nxtbook.com/nxtbooks/sae/14OFHP11
https://www.nxtbook.com/nxtbooks/sae/14AUTP11
https://www.nxtbook.com/nxtbooks/sae/14OFHD10
https://www.nxtbook.com/nxtbooks/sae/14AUTP10
https://www.nxtbook.com/nxtbooks/sae/14AUTD09
https://www.nxtbook.com/nxtbooks/sae/14AERD09
https://www.nxtbook.com/nxtbooks/sae/14OFHP09
https://www.nxtbook.com/nxtbooks/sae/14AUTP09
https://www.nxtbook.com/nxtbooks/sae/14VED08
https://www.nxtbook.com/nxtbooks/sae/14OFHD08
https://www.nxtbook.com/nxtbooks/sae/14AUTD08
https://www.nxtbook.com/nxtbooks/sae/14AERD07
https://www.nxtbook.com/nxtbooks/sae/14OFHP07
https://www.nxtbook.com/nxtbooks/sae/14AUTP07
https://www.nxtbook.com/nxtbooks/sae/14OFHD06
https://www.nxtbook.com/nxtbooks/sae/14AUTP06
https://www.nxtbook.com/nxtbooks/sae/14VED05
https://www.nxtbook.com/nxtbooks/sae/14AERD05
https://www.nxtbook.com/nxtbooks/sae/14AUTD05
https://www.nxtbook.com/nxtbooks/sae/14OFHP05
https://www.nxtbook.com/nxtbooks/sae/14OFHD04
https://www.nxtbook.com/nxtbooks/sae/14AUTP04
https://www.nxtbook.com/nxtbooks/sae/14AUTD03
https://www.nxtbook.com/nxtbooks/sae/14AERD03
https://www.nxtbook.com/nxtbooks/sae/14OFHP03
https://www.nxtbook.com/nxtbooks/sae/14AUTP03
https://www.nxtbook.com/nxtbooks/sae/14VED02
https://www.nxtbook.com/nxtbooks/sae/14OFHP02
https://www.nxtbook.com/nxtbooks/sae/14AUTP02
https://www.nxtbook.com/nxtbooks/sae/14OFHD01
https://www.nxtbook.com/nxtbooks/sae/14AERD01
https://www.nxtbook.com/nxtbooks/sae/14AUTD01
https://www.nxtbook.com/nxtbooks/sae/13AEID1203
https://www.nxtbook.com/nxtbooks/sae/13EVSD1218
https://www.nxtbook.com/nxtbooks/sae/13OFHD1212
https://www.nxtbook.com/nxtbooks/sae/13OFHD1107
https://www.nxtbook.com/nxtbooks/sae/13AERD1106
https://www.nxtbook.com/nxtbooks/sae/13AEID1105
https://www.nxtbook.com/nxtbooks/sae/13EVSD1024
https://www.nxtbook.com/nxtbooks/sae/13AEID1022
https://www.nxtbook.com/nxtbooks/sae/13OFHD1017
https://www.nxtbook.com/nxtbooks/sae/13AEID1001
https://www.nxtbook.com/nxtbooks/sae/13AEID0917
https://www.nxtbook.com/nxtbooks/sae/13OFHD0905
https://www.nxtbook.com/nxtbooks/sae/13AERD0904
https://www.nxtbook.com/nxtbooks/sae/13AEID0903
https://www.nxtbook.com/nxtbooks/sae/13EVSD0821
https://www.nxtbook.com/nxtbooks/sae/13OFHD0808
https://www.nxtbook.com/nxtbooks/sae/13AEID0806
https://www.nxtbook.com/nxtbooks/sae/13AEID0716
https://www.nxtbook.com/nxtbooks/sae/13OFHD0711
https://www.nxtbook.com/nxtbooks/sae/13AERD0703
https://www.nxtbook.com/nxtbooks/sae/13AEID0702
https://www.nxtbook.com/nxtbooks/sae/13EVSD0626
https://www.nxtbook.com/nxtbooks/sae/13AEID0618
https://www.nxtbook.com/nxtbooks/sae/13OFHD0613
https://www.nxtbook.com/nxtbooks/sae/13AEID0604
https://www.nxtbook.com/nxtbooks/sae/13OFHD0509
https://www.nxtbook.com/nxtbooks/sae/13AEID0507
https://www.nxtbook.com/nxtbooks/sae/13AERD0501
https://www.nxtbook.com/nxtbooks/sae/13EVSD0418
https://www.nxtbook.com/nxtbooks/sae/13AEID0416
https://www.nxtbook.com/nxtbooks/sae/13OFHD0404
https://www.nxtbook.com/nxtbooks/sae/13AEID0402
https://www.nxtbook.com/nxtbooks/sae/13AEID0319
https://www.nxtbook.com/nxtbooks/sae/13OFHD0307
https://www.nxtbook.com/nxtbooks/sae/13AERD0306
https://www.nxtbook.com/nxtbooks/sae/13AEID0305
https://www.nxtbook.com/nxtbooks/sae/13EVSD0221
https://www.nxtbook.com/nxtbooks/sae/13OFHD0207
https://www.nxtbook.com/nxtbooks/sae/13AEID0205
https://www.nxtbook.com/nxtbooks/sae/13AEID0115
https://www.nxtbook.com/nxtbooks/sae/13OFHD0110
https://www.nxtbook.com/nxtbooks/sae/13AERD0102
https://www.nxtbook.com/nxtbooks/sae/12EVSD1218
https://www.nxtbook.com/nxtbooks/sae/12OFHD1213
https://www.nxtbook.com/nxtbooks/sae/12AERD1212
https://www.nxtbook.com/nxtbooks/sae/12AEID1204
https://www.nxtbook.com/nxtbooks/sae/12OFHD1129
https://www.nxtbook.com/nxtbooks/sae/12AERD1114
https://www.nxtbook.com/nxtbooks/sae/12OFHD1108
https://www.nxtbook.com/nxtbooks/sae/12AEID1106
https://www.nxtbook.com/nxtbooks/sae/12EVSD1025
https://www.nxtbook.com/nxtbooks/sae/12AERD1024
https://www.nxtbook.com/nxtbooks/sae/12AEID1023
https://www.nxtbook.com/nxtbooks/sae/12OFHD1011
https://www.nxtbook.com/nxtbooks/sae/12AEID1002
https://www.nxtbook.com/nxtbooks/sae/12OFHD0927
https://www.nxtbook.com/nxtbooks/sae/12AEID0918
https://www.nxtbook.com/nxtbooks/sae/12AERD0912
https://www.nxtbook.com/nxtbooks/sae/12OFHD0906
https://www.nxtbook.com/nxtbooks/sae/12AEID0904
https://www.nxtbook.com/nxtbooks/sae/12EVSD0821
https://www.nxtbook.com/nxtbooks/sae/12AERD0815
https://www.nxtbook.com/nxtbooks/sae/12OFHD0809
https://www.nxtbook.com/nxtbooks/sae/12AEID0807
https://www.nxtbook.com/nxtbooks/sae/12OFHD0726
https://www.nxtbook.com/nxtbooks/sae/12AERD0718
https://www.nxtbook.com/nxtbooks/sae/12AEID0717
https://www.nxtbook.com/nxtbooks/sae/12OFHD0705
https://www.nxtbook.com/nxtbooks/sae/12AEID0703
https://www.nxtbook.com/nxtbooks/sae/12EVSD0626
https://www.nxtbook.com/nxtbooks/sae/12AEID0619
https://www.nxtbook.com/nxtbooks/sae/12OFHD0614
https://www.nxtbook.com/nxtbooks/sae/12AERD0613
https://www.nxtbook.com/nxtbooks/sae/12AEID0605
https://www.nxtbook.com/nxtbooks/sae/12OFHD0524
https://www.nxtbook.com/nxtbooks/sae/12AERD0516
https://www.nxtbook.com/nxtbooks/sae/12OFHD0503
https://www.nxtbook.com/nxtbooks/sae/12AEID0501
https://www.nxtbook.com/nxtbooks/sae/12OFHD0419
https://www.nxtbook.com/nxtbooks/sae/12EVSD0418
https://www.nxtbook.com/nxtbooks/sae/12AEID0417
https://www.nxtbook.com/nxtbooks/sae/12AERD0411
https://www.nxtbook.com/nxtbooks/sae/12AEID0403
https://www.nxtbook.com/nxtbooks/sae/12OFHD0329
https://www.nxtbook.com/nxtbooks/sae/12AEID0320
https://www.nxtbook.com/nxtbooks/sae/12AERD0314
https://www.nxtbook.com/nxtbooks/sae/12OFHD0308
https://www.nxtbook.com/nxtbooks/sae/12AEID0306
https://www.nxtbook.com/nxtbooks/sae/12OFHD0223
https://www.nxtbook.com/nxtbooks/sae/12EVSD0221
https://www.nxtbook.com/nxtbooks/sae/12AERD0215
https://www.nxtbook.com/nxtbooks/sae/12AEID0207
https://www.nxtbook.com/nxtbooks/sae/12OFHD0202
https://www.nxtbook.com/nxtbooks/sae/12AERD0118
https://www.nxtbook.com/nxtbooks/sae/12AEID0117
https://www.nxtbook.com/nxtbooks/sae/12OFHD0112
https://www.nxtbook.com/nxtbooks/sae/11OFHD1215
https://www.nxtbook.com/nxtbooks/sae/11AERD1214
https://www.nxtbook.com/nxtbooks/sae/11AEID1206
https://www.nxtbook.com/nxtbooks/sae/11EVSD1130
https://www.nxtbook.com/nxtbooks/sae/11OFHD1117
https://www.nxtbook.com/nxtbooks/sae/11AERD1116
https://www.nxtbook.com/nxtbooks/sae/11OFHD1103
https://www.nxtbook.com/nxtbooks/sae/11AEID1101
https://www.nxtbook.com/nxtbooks/sae/11AERD1026
https://www.nxtbook.com/nxtbooks/sae/11AEID1018
https://www.nxtbook.com/nxtbooks/sae/11OFHD1013
https://www.nxtbook.com/nxtbooks/sae/11AERD1012
https://www.nxtbook.com/nxtbooks/sae/11AEID1004
https://www.nxtbook.com/nxtbooks/sae/11AERD0928
https://www.nxtbook.com/nxtbooks/sae/11OFHD0922
https://www.nxtbook.com/nxtbooks/sae/11AEID0920
https://www.nxtbook.com/nxtbooks/sae/11AERD0907
https://www.nxtbook.com/nxtbooks/sae/11AEID0906
https://www.nxtbook.com/nxtbooks/sae/11OFHD0901
https://www.nxtbook.com/nxtbooks/sae/11OFHD_lubrizol-ch
https://www.nxtbook.com/nxtbooks/sae/11EVSD0824
https://www.nxtbook.com/nxtbooks/sae/11OFHD_lubrizol
https://www.nxtbook.com/nxtbooks/sae/11AERD0817
https://www.nxtbook.com/nxtbooks/sae/11OFHD0811
https://www.nxtbook.com/nxtbooks/sae/11AEID0802
https://www.nxtbook.com/nxtbooks/sae/11AERD0727
https://www.nxtbook.com/nxtbooks/sae/11OFHD0728
https://www.nxtbook.com/nxtbooks/sae/11AEID0719
https://www.nxtbook.com/nxtbooks/sae/11AERD0713
https://www.nxtbook.com/nxtbooks/sae/11OFHD0707
https://www.nxtbook.com/nxtbooks/sae/11AEID0705
https://www.nxtbook.com/nxtbooks/sae/11AERD0629
https://www.nxtbook.com/nxtbooks/sae/11AEID0621
https://www.nxtbook.com/nxtbooks/sae/11OFHD0616
https://www.nxtbook.com/nxtbooks/sae/11AERD0608
https://www.nxtbook.com/nxtbooks/sae/11AEID0607
https://www.nxtbook.com/nxtbooks/sae/11OFHD0526
https://www.nxtbook.com/nxtbooks/sae/11EVSD0525
https://www.nxtbook.com/nxtbooks/sae/11AERD0518
https://www.nxtbook.com/nxtbooks/sae/11AEID0503
https://www.nxtbook.com/nxtbooks/sae/11OFHD0505
https://www.nxtbook.com/nxtbooks/sae/11AERD0427
https://www.nxtbook.com/nxtbooks/sae/11AEID0419
https://www.nxtbook.com/nxtbooks/sae/11OFHD0414
https://www.nxtbook.com/nxtbooks/sae/11AERD0413
https://www.nxtbook.com/nxtbooks/sae/11AEID0405
https://www.nxtbook.com/nxtbooks/sae/11OFHD0331
https://www.nxtbook.com/nxtbooks/sae/11AERD0323
https://www.nxtbook.com/nxtbooks/sae/11AEID0315
https://www.nxtbook.com/nxtbooks/sae/11OFHD0310
https://www.nxtbook.com/nxtbooks/sae/11AERD0302
https://www.nxtbook.com/nxtbooks/sae/11AEID0301
https://www.nxtbook.com/nxtbooks/sae/11EVSD0223
https://www.nxtbook.com/nxtbooks/sae/11OFHD0217
https://www.nxtbook.com/nxtbooks/sae/11AERD0209
https://www.nxtbook.com/nxtbooks/sae/11OFHD0204
https://www.nxtbook.com/nxtbooks/sae/11AEID0201
https://www.nxtbook.com/nxtbooks/sae/11AERD0119
https://www.nxtbook.com/nxtbooks/sae/11AEID0118
https://www.nxtbook.com/nxtbooks/sae/11OFHD0113
https://www.nxtbook.com/nxtbooks/sae/10AEID1221
https://www.nxtbook.com/nxtbooks/sae/10AEMD1215
https://www.nxtbook.com/nxtbooks/sae/10OFHD1216
https://www.nxtbook.com/nxtbooks/sae/10AEID1207
https://www.nxtbook.com/nxtbooks/sae/10OFHD1203
https://www.nxtbook.com/nxtbooks/sae/10OFHD1118
https://www.nxtbook.com/nxtbooks/sae/10AEID1116
https://www.nxtbook.com/nxtbooks/sae/10AEID1102
https://www.nxtbook.com/nxtbooks/sae/10AEMD1110
https://www.nxtbook.com/nxtbooks/sae/10EVSD1104
https://www.nxtbook.com/nxtbooks/sae/10OFHD1028
https://www.nxtbook.com/nxtbooks/sae/10AEMD1027
https://www.nxtbook.com/nxtbooks/sae/10OFHD1014
https://www.nxtbook.com/nxtbooks/sae/10AEMD1013
https://www.nxtbook.com/nxtbooks/sae/10AEID1014
https://www.nxtbook.com/nxtbooks/sae/10AEID1005
https://www.nxtbook.com/nxtbooks/sae/10OFHD1001
https://www.nxtbook.com/nxtbooks/sae/10OFHD0923
https://www.nxtbook.com/nxtbooks/sae/10AEID0921
https://www.nxtbook.com/nxtbooks/sae/10AEMD0915
https://www.nxtbook.com/nxtbooks/sae/10OFHD0909
https://www.nxtbook.com/nxtbooks/sae/10AEMD0908
https://www.nxtbook.com/nxtbooks/sae/10AEID0907
https://www.nxtbook.com/nxtbooks/sae/10AEMD0901
https://www.nxtbook.com/nxtbooks/sae/10OFHD0826
https://www.nxtbook.com/nxtbooks/sae/10AEMD0825
https://www.nxtbook.com/nxtbooks/sae/10AEID0817
https://www.nxtbook.com/nxtbooks/sae/10AEMD0811
https://www.nxtbook.com/nxtbooks/sae/10AEID0803
https://www.nxtbook.com/nxtbooks/sae/10OFHD0803
https://www.nxtbook.com/nxtbooks/sae/10AEMD0728
https://www.nxtbook.com/nxtbooks/sae/10OFHD0722
https://www.nxtbook.com/nxtbooks/sae/10AEMD0721
https://www.nxtbook.com/nxtbooks/sae/10AEID0720
https://www.nxtbook.com/nxtbooks/sae/10OFHD0708
https://www.nxtbook.com/nxtbooks/sae/10AEMD0707
https://www.nxtbook.com/nxtbooks/sae/10AEID0707
https://www.nxtbook.com/nxtbooks/sae/10OFHD0624
https://www.nxtbook.com/nxtbooks/sae/10AEMD0623
https://www.nxtbook.com/nxtbooks/sae/10AEMD0616
https://www.nxtbook.com/nxtbooks/sae/10AEID0615
https://www.nxtbook.com/nxtbooks/sae/100FHD0422_v2
https://www.nxtbook.com/nxtbooks/sae/10AEMD0609
https://www.nxtbook.com/nxtbooks/sae/10AEMD0602
https://www.nxtbook.com/nxtbooks/sae/10AEID0601
https://www.nxtbook.com/nxtbooks/sae/10OFHD0603
https://www.nxtbook.com/nxtbooks/sae/10AEMD0526
https://www.nxtbook.com/nxtbooks/sae/10OFHD0520
https://www.nxtbook.com/nxtbooks/sae/10AEID0518
https://www.nxtbook.com/nxtbooks/sae/10AEMD0519
https://www.nxtbook.com/nxtbooks/sae/10AEMD0512
https://www.nxtbook.com/nxtbooks/sae/10OFHD0506
https://www.nxtbook.com/nxtbooks/sae/10AEMD0505
https://www.nxtbook.com/nxtbooks/sae/10AEID0504
https://www.nxtbook.com/nxtbooks/sae/10AEMD0428
https://www.nxtbook.com/nxtbooks/sae/10OFHD0422
https://www.nxtbook.com/nxtbooks/sae/10AEMD0421
https://www.nxtbook.com/nxtbooks/sae/10AEID0420
https://www.nxtbook.com/nxtbooks/sae/10AEMD0407
https://www.nxtbook.com/nxtbooks/sae/10AEID0406
https://www.nxtbook.com/nxtbooks/sae/10AEMD0331
https://www.nxtbook.com/nxtbooks/sae/10OFHD0405
https://www.nxtbook.com/nxtbooks/sae/10OFHD0325
https://www.nxtbook.com/nxtbooks/sae/10AEMD0324
https://www.nxtbook.com/nxtbooks/sae/10AEMD0317
https://www.nxtbook.com/nxtbooks/sae/10AEID0316
https://www.nxtbook.com/nxtbooks/sae/10OFHD0311
https://www.nxtbook.com/nxtbooks/sae/10AEMD0310
https://www.nxtbook.com/nxtbooks/sae/10AEMD0303
https://www.nxtbook.com/nxtbooks/sae/10AEID0302
https://www.nxtbook.com/nxtbooks/sae/10OFHD0225
https://www.nxtbook.com/nxtbooks/sae/10AEMD0224
https://www.nxtbook.com/nxtbooks/sae/10AEMD0217
https://www.nxtbook.com/nxtbooks/sae/10AEID0216
https://www.nxtbook.com/nxtbooks/sae/10AEMD0210
https://www.nxtbook.com/nxtbooks/sae/10AEMD0203
https://www.nxtbook.com/nxtbooks/sae/10AEID0202
https://www.nxtbook.com/nxtbooks/sae/10OFHD0203
https://www.nxtbook.com/nxtbooks/sae/10OFHD0128
https://www.nxtbook.com/nxtbooks/sae/10AEMD0127
https://www.nxtbook.com/nxtbooks/sae/10AEMD0120
https://www.nxtbook.com/nxtbooks/sae/10OFHD0114
https://www.nxtbook.com/nxtbooks/sae/10AEID0119
https://www.nxtbook.com/nxtbooks/sae/10AEMD0113
https://www.nxtbook.com/nxtbooks/sae/10AEID0105_v2
https://www.nxtbook.com/nxtbooks/sae/10AEID0105
https://www.nxtbook.com/nxtbooks/sae/09AEMD1223
https://www.nxtbook.com/nxtbooks/sae/09AEMD1209
https://www.nxtbook.com/nxtbooks/sae/AUTODEC09
https://www.nxtbook.com/nxtbooks/sae/09AEMD1125
https://www.nxtbook.com/nxtbooks/sae/09AEMD1111
https://www.nxtbook.com/nxtbooks/sae/AUTONOV09
https://www.nxtbook.com/nxtbooks/sae/OFHNOV09
https://www.nxtbook.com/nxtbooks/sae/09AEMD1028
https://www.nxtbook.com/nxtbooks/sae/09AEMD1014
https://www.nxtbook.com/nxtbooks/sae/OFHOCT09
https://www.nxtbook.com/nxtbooks/sae/AUTOOCT09
https://www.nxtbook.com/nxtbooks/sae/09AEMD0930
https://www.nxtbook.com/nxtbooks/sae/09AEMD0916
https://www.nxtbook.com/nxtbooks/sae/AUTOSEP09
https://www.nxtbook.com/nxtbooks/sae/09AEMD0902
https://www.nxtbook.com/nxtbooks/sae/09AEMD0819
https://www.nxtbook.com/nxtbooks/sae/OFHAUG09
https://www.nxtbook.com/nxtbooks/sae/09AEMD0805
https://www.nxtbook.com/nxtbooks/sae/AUTOAUG09
https://www.nxtbookmedia.com