Bareshaft Pump
53
The typical oil level for a pump that has been oper-
ating and then brought to a stop is shown in (Figure
98). The oil level will be at or near the full mark only
after the pump has been at rest for 5 to 8 hours.
Changing the Power End Oil
1. With the engine off, remove the drain plug
(Figure 97) from the oil drain valve located on
the back of the power end case.
2. Place a container below the valve large
enough to capture the oil. Refer to the oil ca-
pacities listed below.
3. Install an extension hose/pipe to extend the
drain past the trailer frame, if desired.
4. Open the ball valve to drain the oil.
5. After the oil has drained from the case, close
the ball valve and install the plug.
6. Remove the back cover plate and inspect
the magnets at the bottom of the pump for
metal shavings or lings. Clean the magnet.
If excessive shavings or lings were present,
inspect the crankshaft journal bearings.
7. Install the back cover plate.
8. Add 80W/90 gear oil through the ll plug.
• 3000 Series Pumps: 5 gal. (22 L)
• 3600/4200 Series Pumps: 9 gal. (34 L)
9. Install the ll plug when done lling.
Figure 98: Typical Oil Level for Recently Operated Pumps.
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