TM-9-2520-234-35 Technical Manual for M109 Transmission XTG-411-2A Download
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*C2 *C2 *C2 CHAP 5, SEC XVII BRAKE COOLANT OIL PUMP REBUILD PAR 147-151 Section XVII. BRAKE COOLANT OIL PUMP—REBUILD 147. DESCRIPTION Refer to par. 24 for description of the brake coolant oil pump. 148. DISASSEMBLY (fig. 384, fold-out 13) a. Using a 9/16-inch wrench, remove three cap screws 60 with three lock washers 59 and three self-locking bolts 53 securing the brake coolant pump assembly 20 to the brake coolant pump manifold 56. Remove the pump assembly and gasket 54. b. Remove two sets of brake coolant oil check valve components (64 through 68). c. Using l/2-inch wrench, remove self- locking bolt 51 securing drive gear shroud 48 and shroud plate 50 to the pump. Remove the shroud and plate. Straighten and remove lock pin 42 from gear 49. Remove the gear. d. Using a l/2-inch wrench, remove 14 self-locking bolts 27 and 52, securing the two cover assemblies 28 and 44 to the coolant oil pump body 32. Remove the cover assemblies. e. Do not remove the needle bearing as- semblies 29 and 45 or dowel pins 31 and 46 from covers 30 and 47 unless replacement is necessary. If necessary, press or drive out the bearings or pins. f. Remove, as a unit, idler gear shaft 22, pump drive shaft 40, two oil pump idler gears 21 and 26, two drive gears 33 and 43, and the two oil pump separator plate assem- blies 23 and 36 from the pump body. g. Remove idler gears 21 and 26 from their shaft 22. h. Remove oil pump drive gears 33 and 43 and keys 34 and 41 from the pump drive shaft 40. i. Remove two retaining rings 35 from oil oil pump idler 22 and drive 40 gear shafts. j. Remove separator plate assemblies 23 and 36 from shafts 22 and 40. 128 k. Do not remove needle bearings 25 and 37 from separator plates 24 and 38 unless re- placement is necessary. If necessary, press bearings from plates. l. Do not remove retaining rings 39 from oil pump idler 22 and drive 40 gear shafts un- less replacement is necessary. 149. CLEANING Refer to par. 71 for cleaning recommen- dations. 150. INSPECTION AND REPAIR Refer to par. 72 for general inspection and repair recommendations. Repair and re- build points of measurement for fits, clear- ances and wear limits are indicated by small, lower case letters in fig. 384, fold-out 13. Refer to par. 247 for wear limits information. 151. ASSEMBLY (fig. 384, fold-out 13) a. If needle bearings 25 and 37 were re- moved from separator plates 24 and 38, install replacements 0.320-inch below the surface adjacent to the bearing bores. Press on the numbered side of the bearing cage.