4-7.3.9 HP pump pedestal bearing oil change. Change pedestal bearing oil every 6 months or 4000 hours of
operation, whichever comes first This Interval must be reduced to 4 months or 2500 hours for pumping at temperatures
above 2000 F.
Place container under drain plug to catch used oil (Figure 4-9).
Remove drain plug underneath pedestal and allow oil to drain.
Remove oil breather and add 6 quarts of oil (OE/HDO-MIL-L-2104) Replace oil breather.
Clean up any spills and record completion of maintenance action In maintenance logbook.
4-7.3.10 HP pump oil breather cleaning. Clean HP pump oil breather (Figure 4-10) as follows.
Remove wingnut, lockwasher, and flatwasher from oil breather Remove oil breather top.
Remove element from oil breather.
Wipe all dirt from oil breather top and body.
Solvent may cause toxic fumes. Work only In a well-ventilated area Avoid skin and eye contact Do
not breath vapors.
Solvent Is flammable Do not bring open flame or sparks near solvent.
Clean oil breather element with Drycleaning Solvent, Type 2 (A-A-711) Dry thoroughly.
Install oil breather element on body.
Install oil breather top, flatwasher, lockwasher, and wingnut.
4-7.3.11 HP pump V-belt adjustment. Adjust HP pump V-belts (Figure 4-11) as required.
Remove 32 mounting bolts and lockwashers Remove front V-belt housing (two pieces).
Place a straight edge on V-belt In a straight line with bearing bases.
Place tension meter pointer on the line on the center of the front belt.
Do not contact O-ring on tester stem.
Press down on tester stem until register flange just contacts the next belt.
Release pressure and note pressure scale reading under O-ring.
Repeat steps b thru e for rear belt.
Both readings should be 21-25 lbs (9 5-11 25 kg) and within 1 lb (0 45 kg) of each other.
If belts are not adjusted correctly, proceed as follows:.
Loosen four bolts.
Loosen two adjusting screw locknuts.
Turn adjusting screws equally to adjust belt tensioner assembly.