10-1
10. Hydraulic Pump
The optional hydraulic pump, when provided, is
mounted atop the engine (Figure 10-1). See Sec-
tion 13. Specifications regarding hose fittings, fluid
specifications and inlet conditions.
INSTALLING THE HYDRAULIC PUMP
When installing the pump, apply molybdenum disul-
fide paste or equivalent to the shaft spline and
torque the two flange screws to 20 lb-ft (26 N-m).
Do not start the genset before the hydraulic pump
has been connected to the hydraulic system and
filled with oil.
CAUTION
Running the genset without oil in
the hydraulic pump will destroy the pump.
CAUTION
The slightest amount of dirt in an
hydraulic system can damage precisely ma-
chined internal components. Keep dirt out:
• Thoroughly clean the outside of a fitting or
cap before disconnecting or removing it.
• Keep all openings in components and
hoses capped with proper JIC caps until
just before making connections.
• Thoroughly flush hoses before connecting.
• Regularly replace the oil filter.
• Never reuse hydraulic fluid that has been
drained from a system.
CONNECTING HYDRAULIC HOSES
WARNING
The high pressure spray from a leak
or fitting in a hydraulic line can penetrate the
skin, leading to possible blood poisoning —
Wear safety glasses — Shut down the genset
before loosening or tightening fittings — Do not
delay getting proper medical attention if ex-
posed to high pressure oil spray.
When connecting hoses and starting up the system:
1. Consider that hoses shrink slightly in length
and expand slightly in diameter under pres-
sure.
2. There must be enough slack in the connected
hoses to prevent strain due to movement of the
pump.
3. Support, restrain and protect hydraulic hose as
necessary to prevent chaffing.
4. Do not bend hose tighter than the hose
manufacturer recommends.
5. Use wide-sweep 90-degree fittings.
6. Always use two wrenches when tightening hy-
draulic fittings.
7. Install an SAE Class 4 filter (10 micron) in the
system.
8. The system oil reservoir should be above the
pump and the hose from the pump should slope
up to the reservoir.
9. To fill the pump, first fill the reservoir and crank
the engine with the spark plug cables discon-
nected from the spark plugs to prevent the en-
gine from starting. Replenish oil in the reservoir
as necessary.
10. The installed system must not cause pump inlet
conditions to exceed Specifications.
CAUTION
Continuing to run or load a
noisy pump can destroy it. Purge the air be-
fore continuing.
11. The hydraulic system has air in it as long as
there continues to be sharp metallic noise. Run
the genset for a few seconds at a time until all
air has been purged.
FIGURE 10-1. HYDRAULIC PUMP
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