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TM 5-4210-220-34
2-12.
PUMP DRIVE AND PTO - Continued
(2)
Remove capscrews (1), lockwashers (2), and separate the spacer plates (8 and 9), and gaskets (6) from
disc joint (7).
(3)
For slipping disc joint only, separate the disc joint (7) from the wiper (5) and mechanical seal (3).
(4)
For locking disc joint only cut and remove safety wire (10). Remove capscrews (11) and retainer (12).
(5)
For locking disc joint only, slide the disc joint from drive shaft. Remove the snap ring (13) and pull
mechanical seal (3), spring (4), and wiper (5) from drive shaft (16).
(6)
Remove all gaskets (6) from disc joint assemblies and discard.
WARNING
Dry cleaning solvent P-D-680 (safety or Stoddard’s solvent) is potentially dangerous. Avoid
repeated and prolonged breathing of vapors and skin contact with the liquid. Do not use near open
flame, arcing equipment or other ignition sources. Always wear eye protection and protective
clothing. The flash point of P-D-680 is 100 to 138 deg. F (30 to 59 deg. C).
(7)
Wash spacer plates, mechanical seal, wiper, spring, drive shaft splines, and fasteners using dry cleaning
solvent (item 10, Appendix B).
WARNING
Death or serious injury could occur If compressed air is directed against the skin. Do not use
compressed air for cleaning or drying unless the pressure is/has been reduced to 30 psi (2.11
kg/cm2) or less. When working with compressed air always use chip guards, eye protection and
other personal protective equipment.
(8)
After washing, dry components using compressed air.
(9)
Inspect space plates and wiper for cracks, warped mating surfaces or corrosion. Replace as necessary.
(10) Inspect mechanical seal for corrosion, wear, or dents. Replace as necessary.
(11) Test grease fitting by pumping grease (item 16, Appendix B) through fitting. If blocked, replace fitting.
(12) Inspect drive shaft tube and splined section for dents, cracks, or worn splines. If damage is evident,
replace complete drive shaft assembly (including both disc joints).
NOTE
Keep work area clean to avoid the possibility of contamination of the disc joint.
2-79
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