Fleet Maintenance - 15

Clutch considerations

With respect to clutches, Volvo's Murickan says
AMTs are similar to manual transmissions and
offer similar warranty coverages. Preventive
maintenance is also enhanced.
"AMTs are equipped with clutch wear sensors
that alert the driver when a replacement is due,"
Murickan says. "Technicians
need to recalibrate the clutch
whenever it is replaced.
However, no manual adjustments are needed."
Electric clutch actuation
(ECA) clutches are engineered
specifically for AMTs. They
offer several performance
benefits, but also introduce
some new maintenance
considerations.
"ECA offers the durability
and performance necessary to
withstand the high actuation
conditions associated with
AMTs," Eaton's Pfister says.
"ECAs enable better launch
and shift decisions through
grade sensing, weight computation, and driver throttle
commands. They also provide
smooth engagement and a
high fidelity of vehicle control,
even in the most challenging
applications."
ECA clutches use a unique
inertia brake called a low-capacity inertia brake (LCIB) to
shorten shift cycles. Thus, it
is necessary to grease the
clutch-release bearing and
cross shafts with the proper grease at the required
intervals.
"For most linehaul applications, the release bearing
lubrication interval is 50,000
miles," Pfister points out.
Because AMTs reduce or
eliminate the potential for
driver abuse, fleets are likely
to experience less clutch-facing wear, which can extend
the clutch replacement cycle.
"Fleets may also see extended lifecycles on various internal mechanical components
such as sliding clutches and
gears, as well as driveline
components such as U-joints,
differentials, and axles,"
Pfister adds.
Newer-generation AMTs
now utilize a 430mm singleplate, diaphragm-style organic clutch. According to Pfister,
this style of clutch is designed
to be maintenance-free and
has fewer moving parts than
its predecessors.

Lubes and intervals

As for lubrication, Volvo's Murickan says AMTs
and manual transmissions use similar transmission oil and oil drain intervals. Normal preventive maintenance inspections for fluid levels and
leaks should be followed.
Some AMTs do require unique lubes. For

example, Eaton's heavy duty AMTs require
Eaton's PS-386 transmission lube, which is
specially formulated to prevent wear and
improve fuel economy. Fleets should always
refer to manufacturer recommendations
as to which lubes should be used in which
transmissions.

VehicleServicePros.com/10123733

May 2020 | VehicleServicePros.com

15


http://www.isuzucv.com http://www.VehicleServicePros.com/10123733

Fleet Maintenance

Table of Contents for the Digital Edition of Fleet Maintenance

Uptime: Expecting the unexpected
Editor's Note: Catching up on fleet maintenance
Maintenance considerations for manual versus automated manual transmissions
DPFs: Clean or replace?
Why Identify and track vehicle warranties?
Lube it or lose it
OTA: Supporting uptime remotely
Management: How fleets can benefit from having a SAMP
Training: Supporting today's students and tomorrow's techs
Diagnostics: Assessing aftermarket diagnostic solutions
Fleet Part & Components
Tools & Equipment
Guest Editorial: Keeping tire pressure at optimum levels
Fleet Maintenance - 1
Fleet Maintenance - 2
Fleet Maintenance - 3
Fleet Maintenance - 4
Fleet Maintenance - 5
Fleet Maintenance - 6
Fleet Maintenance - 7
Fleet Maintenance - Uptime: Expecting the unexpected
Fleet Maintenance - 9
Fleet Maintenance - Editor's Note: Catching up on fleet maintenance
Fleet Maintenance - 11
Fleet Maintenance - Maintenance considerations for manual versus automated manual transmissions
Fleet Maintenance - 13
Fleet Maintenance - 14
Fleet Maintenance - 15
Fleet Maintenance - 16
Fleet Maintenance - 17
Fleet Maintenance - DPFs: Clean or replace?
Fleet Maintenance - 19
Fleet Maintenance - 20
Fleet Maintenance - 21
Fleet Maintenance - 22
Fleet Maintenance - 23
Fleet Maintenance - Why Identify and track vehicle warranties?
Fleet Maintenance - 25
Fleet Maintenance - 26
Fleet Maintenance - 27
Fleet Maintenance - 28
Fleet Maintenance - 29
Fleet Maintenance - Lube it or lose it
Fleet Maintenance - 31
Fleet Maintenance - 32
Fleet Maintenance - 33
Fleet Maintenance - OTA: Supporting uptime remotely
Fleet Maintenance - 35
Fleet Maintenance - Management: How fleets can benefit from having a SAMP
Fleet Maintenance - Training: Supporting today's students and tomorrow's techs
Fleet Maintenance - Diagnostics: Assessing aftermarket diagnostic solutions
Fleet Maintenance - 39
Fleet Maintenance - Fleet Part & Components
Fleet Maintenance - Tools & Equipment
Fleet Maintenance - Guest Editorial: Keeping tire pressure at optimum levels
Fleet Maintenance - 43
Fleet Maintenance - 44
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