Initial Engine Start
Use the hand pump to raise the accumulator pressure. An accumulator pressure of 1500 psi (10 335 kPa) when the
ambient temperature is above 40°F (4°C) will provide adequate cranking to start the engine. Between 40°F (4°C) and
0°F (-18°C), 2500 psi (17 225 kPa) should be sufficient. Below 0° F (-18° C), the accumulator should be charged to the
maximum recommended pressure. Although the hydrostarter cranks the engine faster than other starting systems,
starting aids should be used in cold weather.
NOTE: Use the priming pump to make sure the filters, lines, manifolds and injectors are full of fuel before
attempting to start the engine.
For ambient temperatures below 40°F (4°C), use a fluid starting aid. Add the starting fluid just prior to moving the
hydrostarter lever and during the cranking cycle as required. Do not wait to add the starting fluid after the engine is
turning over, otherwise the accumulator charge may be used up before the engine can start. In this case, the
accumulator charge must be replaced with the hand pump. With the engine controls set for start (throttle at least half-
open), push the hydrostarter control lever to simultaneously engage the starter pinion with the flywheel ring gear and to
open the control valve. Close the valve quickly when the engine starts, to conserve the accumulator pressure and
prevent excessive overrunning of the starter drive clutch assembly. Three different basic types of flywheel ring gears are
used; no chamfer, Bendix chamfer, or Dyer chamfer on the gear teeth. Some difficulty may be encountered in engaging
the -starter pinion with the Dyer chamfered ring gears. When this happens, it .is necessary to disengage and re-
engage until the starter pinion is cammed in the opposite direction enough to allow the teeth to mesh.
Remote Control System
The hydrostarter remote control system (Fig. 7) consists of a master cylinder, a pedal, a lever arm, two springs and a
flexible hose. It is an independent hydraulic system using diesel fuel oil as a hydraulic fluid to actuate the hydrostarter
control valve by means of the pedal operated master cylinder.
The master cylinder is connected to the control valve on the hydrostarter by a flexible hose. Pressing on the pedal forces
the fluid through the hose to the control valve which engages the starter pinion with the engine flywheel ring gear.
Release the pedal as soon as the engine starts.
Fig. 7 - Hydrostarter Remote Control System
The hydrostarter motor is equipped with a control valve that incorporates a threaded valve housing plug with a 1/8" -27
tapped hole in the center for installation of the flexible hose. A 1/8"-27 pipe plug is installed when the remote control
system is not used.
Springs are used to return the master cylinder pedal and the hydrostarter control lever to the off position.
Remove the filler cap from the reservoir and add a sufficient quantity of' hydraulic fluid (a mixture of 75% diesel fuel and
25% SAE 10 or 30 lubricating oil) to fill the system.
The required amount of hydraulic fluid will vary depending upon the size of the reservoir, length of hydraulic hoses and
the size and number of accumulators. The reservoirs are available in 10, 12, 16 and 23 quart (9, 11, 15, 22 liters)
capacities. In a 10 quart (9 liters) capacity reservoir, add approximately 8 quarts (8 liters) of hydraulic fluid, 10 quarts (9
liters) in a 12 quart (11 liters) reservoir, 14 quarts (13 liters)