Clean and reinstall drain plug (1).
Fill the crankcase with the correct type of lubricating oil (refer to Lubrication Chart, LO 10-4610-232-12). This
crankcase holds 3 gallons (11.4 liters) of lubricating oil.
(7) Reinstall fill plug (2).
a. Remove straightedge (7, Figure 4-97) from left side of belt guard and place it between sheaves (1 and 2, Figure
4-96) as shown.
b. Reset upper sliding rubber marker on belt tension gage (3) to handle. Set lower marker on deflection scale at
5/16 (0.79 cm).
c. Place gage (3) at middle of belt and press until belt is deflected 5/16. Use the straightedge to determine proper
deflection when rubber marker comes even with bottom.
d. Remove gage and read scale under top sliding rubber marker. That number is the force in pounds required to
deflect the belt 5/16, The force required should be between 8 and 13 pounds.
e. If drive belt tension is not between 8 and 13 pounds, loosen four nuts (4) to allow the motor (5) to be moved.
f. Turn jackscrews (6) clockwise to tighten the drive belt (7). Turn counterclockwise to loosen the drive belt.
g. Check the alignment of sheaves (1 and 2) by placing the straightedge across the faces of the sheaves. If the
sheaves are not aligned, move motor (5) to bring the sheaves into proper alignment.
h. Recheck belt tension as described above. Then tighten four nuts (4).
i. Install high pressure pump belt guard (para. 4-82).
j. Return the straightedge to the high pressure pump belt guard.
Figure 4-96. High Pressure Pump Belt Adjustment