TM 5-4310-381-13
TM 5-4310-381-13
CHAPTER 3. UNIT MAINTENANCE INSTRUCTIONS
SECTION I. LUBRICATION INSTRUCTIONS
3-1.
ENGINE LUBRICATION. Refer to TM 5-2805-257-14for engine lubrication instructions and Lubrication Order LO
5-2805-257-12 (15 July 1986).
3-2.
AIR PUMP LUBRICATION.
CAUTION
Oil drain plug (3) is located on opposite side and is lower on gear case
than level plug (2). Do not confuse the two plugs or oil will be lost.
CAUTION
When removing oil plugs (1, 2 and 3), do not mix plugs. Oil fill plug (1)
is vented, oil drain plug (3) is magnetic.
NOTE
It is normal for a small amount of oil to seep from vent holes in normal
operation.
a. Fresh oil should be added through filler plug (1 )on top of gear case to maintain proper level. Remove oil level
plug (2) and fill gear case until oil drips out of oil level hole (2).
b. Oil should be drained, flushed, and replaced every 1500 hours of operation under normal service. Change oil
more frequently in extreme heat or dirty environments.
c. Remove drain plug (3) to drain oil. Pour a small amount of fresh oil through filler plug (1) opening and let drain.
Replace drain plug (3).
NOTE
Bearings in drive shaft end are sealed and do not require lubrication.
d. Repeat step a. and replace plugs (1 and 2). The following table provides a guideline for proper oil viscosities.
3-1
Temperature
Oil Grade
Oil Capacity
-40º -32ºF
SAE 10W
2 oz.
(-40º -0ºC)
32º -100º F
SAE 20
2 oz.
(0-38ºC)
100-275ºF
SAE 40
2 oz.
(38º -135ºC)
Table 3-1. Pump Oil Grades and Capacities
