2. Disconnect the hydraulic hoses from the starting
Remove the Hydrostarter from the engine every 2000
3. Remove the three retaining bolts and lock washers
hours for lubrication. Before removing the Hydro-
and withdraw the starting motor from the flywheel
starter, release the pressure in the system by means of
the relief valve in the hand pump. Then remove the
three bolts which retain the starting motor to the
4. Disassemble the starting motor.
flywheel housing. Remove the starting motor without
disconnecting the hydraulic oil hoses. This will prevent
5. Wash the Hydrostarter drive clutch assembly in
dirt and air from entering the hydraulic system.
clean fuel oil to remove the old lubricant.
Apply a good quality, lightweight grease on the drive
6. When the clutch is free, apply SAE 5W lubricating
clutch pinion to make sure the clutch will slide freely
while compressing the spring. Also apply grease to the
fingers of the clutch fork and on the spool of the
7. Reassemble the starting motor and reinstall it on
clutch yoke engaged by the fork. This lubrication
the engine. Then attach a tag to the starter noting the
period may be reduced or lengthened according to the
lubricant used in the clutch.
severity of service.
8. Recharge the accumulator with the hand pump.
Remove the pipe plug from the starting motor drive
housing and saturate the shaft oil wick with engine oil.
Then reinstall the plug.
After lubricating, install the starting motor on the
In addition to the normal Hydrostarter lubrication and
flywheel housing and recharge the accumulator with
maintenance instructions, the following special precau-
the hand pump.
tions must be taken for marine installations or other
cases where equipment is subject to salt spray and air,
On engines equipped with a hydraulic remote control
or other corrosive atmospheres:
system, lubricate the shaft in the master cylinder
1. Clean all exposed surfaces and apply a coat of zinc-
through the pressure grease fitting every 2000 hours.
chromate primer, followed by a coat of suitable paint.
2. Apply a liberal coating of Lubriplate, type 130-AA,
Cold Weather Operation
or equivalent, to the following surfaces.
Occasionally, when an engine is operated in regions of
a. The exposed end of the starter control valve and
very low temperatures, the starter drive clutch
around the control shaft where it passes through
assembly may slip when the starter is engaged. If the
the clutch housing.
clutch slips, proceed as follows:
b. The exposed ends of the hand pump cam pin.
1. Release the oil pressure in the system by opening
the relief valve in the hand pump.
3. Operate all of the moving parts and check the
protective paint and lubrication every week.
CAUTION: The oil pressure in the system must
Consult an authorized Detroit Diesel Allison Service
be released prior to servicing the Hydrostarter
Outlet for any information relating to the Hydrostarter
motor or other components to prevent possible
injury to personnel or equipment.
necessary to use an air heater or a starting fluid to
In a diesel engine, t h e fuel injected into the
assist ignition of the fuel.
compressed into the cylinder. However, when starting
an engine in extremely cold weather, a large part of
NOTE: Starting aids are NOT intended to
correct for a low battery, heavy oil or other
and cylinder walls, and in overcoming the high
conditions which cause hard starting. They are
friction created by the cold lubricating oil.
to be used only when other conditions are
normal, but the air temperature is too cold for
When the ambient temperature is low, it may be