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Disassemblym (cont)
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TM-5-4210-220-34 Truck Firefiighting 1000 GPM Multipurpose Model 2500L Manual
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Inspection (1) Discard all O-rings, seals, and gaskets
TM 5-4210-220-34 2-12. PUMP DRIVE AND PTO - Continued 2-12.1 Power Take Off Unit - Continued (20)  Reattach mechanical puller kit to the oil supply end of the PTO housing (1).  Tighten pressure screw into oil supply end of drive shaft (30).  Continue to tighten pressure screw until drive shaft is free of spider gear assembly (24). (21)  Remove  drive  shaft  (30)  from  PTO  housing  (1).    Bearings  (20  and  22)  are  still  mounted  on  the  drive shaft. (22)  Carefully maneuver spider gear assembly (24) from PTO housing (1). (23)  Disassemble the spider gear assembly (24) following the procedures listed below. (24)  Remove lock ring (41).  Pull clutch stop spacer (47), opposing clutch discs (39), and bronze clutch discs (40) from the spider gear assembly (24). (25)  Compress spring (36) using arbor press.  Remove lock ring (38), spring retainer (37), and spring (36). 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. (26)  Position   spider   gear   assembly   (24)   on   a cloth   on   workbench   as   shown.      Remove piston  (35)  by  applying  compressed  air  to one of the clutch oil passages in the spider gear  assembly.    Plug   the   remaining   hole with index finger. (27)  Remove inner and outer block vee rings (33 and 34) from the piston (35). (28)  Inspect bearings  (20  and  22)  as  detailed  in para. 2-7. (29)  If  necessary,  press  damaged  bearings  (20 and 22) from drive shaft (30) if any damage is evident.  To remove bearing (20) it will be necessary   to   remove   lock   ring   (23)   from drive shaft. b. Inspection (1) Discard all O-rings, seals, and gaskets 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). 2-70

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