TM 5-5420-227-24
HYDRAULIC PUMP REPAIR (Sheet 6 of 11)
CLEANING AND INSPECTION:
WARNING
Compressed air used for cleaning purposes will not exceed 30 psi.
Use only with effective chip guarding and personal protective
equipment goggles/shield, gloves, etc.
WARNING
Cleaning agent specified is flammable. Use only in well ventilated areas. Keep away
from flames, sparks, or heat. Do not smoke while using. Prevent contact with eyes,
mouth, and/or skin. Wear rubber gloves when performing cleaning procedures.
1. Using rags and dry cleaning solvent, wash all metal parts and dry with compressed air.
CAUTION
Do not spin bearings by hand. This causes wear on parts
when not lubricated.
2. If bearings have been removed, clean them by placing in container and agitating in dry
cleaning solvent. Then use spray gun to flush bearings with dry cleaning solvent while
turning slowly, rinse bearings with clean hydraulic fluid and wrap in clean oiled paper.
3. Check all inside and outside surfaces of pump
housing (A) for nicks, scratches, gouges,
warping, burrs, or dents. Small nicks, scratches)
and burrs may be removed with crocus cloth. If
other damage is found, replace housing (A).
4.
Check threads of all attaching parts for stripping
and wear. Replace as necessary.
5. Examine drive shaft (B) and cylinder block (C),
at the same time, check each piston (D) for
scratches and nicks. Make sure each connecting
rod (E) turns freely at both ends. Test cylinder
block (C) sockets by installing and removing each
piston (D) in each socket. Fit should be firm
and smooth. Check outside of drive shaft (B)
and cylinder block (C) for burrs and nicks.
Using lapping compound, dress down any tiny
burrs or nicks. Replace drive shaft (B), cylinder
block (C), or both if anything more than tiny
burrs or nicks are found.
TA170524
Go on to Sheet 7
4-47