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SECTION III. DIRECT SUPPORT MAINTENANCE PROCEDURES
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TM-5-4210-220-34 Truck Firefiighting 1000 GPM Multipurpose Model 2500L Manual
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General Cleaning Instructions
TM 5-4210-220-34 (1) Drain water tank to reduce truck weight. (2) Park truck on level, hard surface.   Position gear selector to N (neutral) and apply parking brakes (3) Chock wheels of opposite axle. (4) Place 10 ton hydraulic jack beneath differential.   Raise the jack until tires clear the ground. (5) Place maintenance trestles beneath axle, one on each side of differential.  If truck is to be supported by frame, and tires still need to clear the ground, raise the truck high enough to compensate for leaf spring sag. (6) Carefully lower truck onto maintenance trestles.   Be sure maintenance trestles are adjusted to the same height and are of sufficient capacity to carry truck weight. (7) Repeat steps 4 thru 6 to raise other axle. h. Lowering The Truck (1) Place  10  ton  hydraulic  jack  beneath  differential.      Raise  the  jack  until  all  weight  is  off  maintenance trestles. (2) Remove maintenance trestles from beneath axle (one on each side of differential). (3) Carefully  and  slowly,  lower  jack  until  all  weight  is  removed  from  jack.      Immediately  after  truck  is grounded, chock the wheels. (4) Repeat step 1 thru 3 to lower other axle as necessary. (5) Ensure gear selector is positioned to N (neutral) and parking brakes are applied, then remove all wheel chocks. j. Identification Identify all parts of similar shape with tags.   This will make proper reassembly easier Be sure to identify ends of electric, hydraulic, and air lines as they are disconnected. k. Salvage Some assemblies that are removed, even though defective, shall be treated as valuable items.   They may be rebuilt for future use. I. Expendable Parts Whenever  possible,  all  gaskets,  packings,  and  seals  shall  be  discarded  during  removal  or  disassembly. Similarly, lockwire, lockwashers, cotter pins, and like items shall be discarded during disassembly.  All should be replaced during  assembly.    When  removing  seals,  gaskets,  or  packings,  take  care  not  to  damage  (e  g. scratch)  the  sealing  surfaces.    If  surfaces  are  damaged  they  must  be  repolished  to  give  a  good  sealing surface. m. Parts Protection To prevent moisture and dirt from entering housings, lines, and other openings, apply protective covers after disassembly.   Wrap all parts in clean paper or dip parts in rust preventive oil. 2-9

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