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INSTALLATION - TM-5-4210-220-34_429
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TM-5-4210-220-34 Truck Firefiighting 1000 GPM Multipurpose Model 2500L Manual
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INSTALLATION (cont) - TM-5-4210-220-34_431
TM 5-4210-220-34 3-8. ENGINE - Continued (9) Tighten capscrews progressively in steps to the final torque and sequence as shown in the sequence shown on the illustration. (10) Check whether the crankshaft is fitted with a sleeve. (11) If no sleeve is installed, place oil seal expander J4239 against the end of the crankshaft using handle J8092 and guide studs J25002. (12) If a sleeve is installed, place oil seal expander J8682 against the end of the crankshaft.  An oversize oil seal must be used. (13) Liberally  lubricate  the  seal  (standard  or  oversize),  the  crankshaft  and  the  crankshaft  oil  seal  expander  with engine  oil.    (item  17,  Appendix  B).    Failure  to  adequately  lubricate  these  areas  during  seal  installation  can result In seal lip damage at engine start-up. NOTE Keep the sealing lip clean and free from scratches. In   addition,   a   plastic   coating   which   acts   as   a sealant  is  applied  to  the  outer  surface  of  the  seal case.  Do not remove this coating. (14) With  the  lip  of  the  seal  pointed  toward  the engine,   slide   the   seal   over   the   expander and  onto    the    crankshaft.    Remove    the seal expander and guide studs, as required. (15) Install    crankshaft    rear    oil    seal    installer J21112-2  and  guide  studs  J9727-5.    Using handle J3154-1, drive the seal in place until the  installer  seats  squarely  on  the  butt  of the  crankshaft.    Remove  the  seal  installer and guide studs. (16) Check the squareness of the seal (1) in relation to the face of the crankshaft butt (2) by attaching a magnetic base dial indicator to the rear butt of the crankshaft as shown. (17) Pry the crankshaft to the rear end of the  block  and  position  the  point  of  the  dial  indicator  on  the  seal  face. Rotate the crankshaft and note the seal face readings at the 12, 9, 6, and 3 o’clock positions.  The total run- out at each position should not exceed 0.015 in.  (0.381 mm). The hex head of the front crankshaft bolt may be used to turn the crankshaft.  However the barring operation should ALWAYS  be  performed  in  a  clockwise  direction.    It  is  very  important  to  ensure  the  bolt  is  not  loosened.    Serious engine damage may result if the pulley is not securely fastened to the crankshaft. (18) If any reading is over 0.015 in.  (0.381 mm) place the seal installer J21112-2 over the seal and lightly tap with a  soft-faced  hammer  at  the  high  points  This  will  ensure  that  the  tool  is  squarely  seated  on  the  butt  of  the crankshaft. 3-139

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