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Flywheel Housing
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TM-5-4210-220-34 Truck Firefiighting 1000 GPM Multipurpose Model 2500L Manual
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INSTALLATION - TM-5-4210-220-34_429
TM 5-4210-220-34 3-8. ENGINE Continued (4) Support  the  weight  of  the  flywheel  housing  using  a  suitable  sling.  Lifting  eyes  can  be  attached  to  flywheel housing on mounting pads. (5) Remove the twelve attaching bolts located in the flywheel housing. Remove one bolt located behind the small hole cover on the right hand side of the flywheel housing. Then remove the remaining bolts around the upper portion of the housing, and the two bolts which go through the rear end plate from the front and thread into the flywheel housing. Install alining studs J1927-01 to guide the housing until it clears the crankshaft during removal. (6) Using  a  soft-faced  hammer,  strike  the  front  face  of  the  flywheel  housing  alternately  on  each  side  of  the engine  to  work  it  off  the  dowels  and  away  from  the  cylinder  block  rear  end  plate.    Take  care  not  to  force blower drive support away from blower drive flange, or to bend cylinder block end plate. (7) Remove all traces of the old gasket from the cylinder block rear end plate and the flywheel housing. (8) Support the outer face of the flywheel housing on wood blocks. (9) Using a hammer and a punch, drive the oil seal out of the housing. (10)   Using a clean cloth, wipe the clean seal bore in the flywheel housing. INSPECTION 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). (1) Wash the flywheel housing 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. (2) Dry the flywheel housing using compressed air. (3) Inspect  the  flywheel  housing  for  cracks,  stripped  threads  or  other  damage.  Replace  flywheel  housing  as necessary. (4) Inspect  the  rear  end  of  the  crankshaft  for  wear  due  to  the  rubbing  action  of  the  oil  seal,  dirt  build  up,  or fretting caused by the action of the flywheel. The crankshaft must be clean and smooth, otherwise the oil seal lip will be damaged when the flywheel housing is reinstalled.  If the seal area is grooved, refer to para. 3-8.10 to replace or to install a sleeve over the crankshaft rear boss. 3-137

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