Pierce Enforcer, Operator'S Manual

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Driveline / 6-27
MAINTENANCE
Driveline
6-21. Driveshafts
Lubricate according to the schedule found in the Pierce Service Manual, group 0501-V-001, Dana Spicer
Driveshafts. Inspect driveshafts for signs of wear, interference, or looseness. Observe any loose wires, hoses, or
other components that may become entangled in the spinning shaft and secure properly.
6-22. Transmission
6-22.1 Transmission Fluid
When changing to a different type of transmission fluid, care should be taken to purge the system of the old fluid
before installing the new fluid. See the transmission manufacturer’s Operator’s manual for recommended fluids and
viscosity grades.
6-22.2 Transmission Fluid Analysis
The presence of water and/or ethylene glycol coolant mixtures in the transmission oil is detrimental to the reliability
and durability of the internal components. This foreign liquid has a deteriorating effect on non-metallic components
(rubber, gasket material, etc.) and on highly loaded steel parts, such as bearings and gears, due to reduced lubricity.
Frictional capacity of drive clutch plates can be greatly reduced, as a result of surface film or impregnation and the
presence of glycol will physically deteriorate clutch plate material.
Local conditions, severity of operation, or duty cycle may require more or less frequent fluid change intervals that
differ from the published recommended fluid change intervals of Allison Transmission. Transmission protection and
fluid change intervals can be optimized by use of fluid analysis. The user should evaluate individual needs and
determine the economics of performing an analysis. If it is suspected that foreign materials have entered the fluid
system, then an analysis needs to be performed immediately.
Fire apparatus are equipped with driveshafts and shafts used for Power Take-Off (PTO) operated
accessories. Never operate the engine with shaft guards removed or with personnel in the vicinity of
any rotating shaft, as they may engage without warning. Hands, clothes, hair, etc., can get caught on
spinning shafts and U-joints. Failure to heed this warning may lead to personal injury or death.
Cease vehicle operation immediately if excessive driveline vibration occurs. Continued operation with
excessive driveline vibration can cause expensive repairs to transmission, axle, or pump components.
For vehicles equipped with air suspensions, do not alter the ride height setting, or severe driveline
vibration and component damage may result.