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