(!) Remove 4 screws ( 8 9 a n d 9 1 , f i g . 3 - 2 2 ) and cage nuts (90and 92) which secure the lower front housing (93) to the left andrighthand housing cornerposts (138 and 139).(@Remove 4 screws(94 and 97) and nuts (95 and 98) whichsecure the upper fronthousing (96)to the left and righthandhousing corner postsand remove upper front housing (96).(g) Perform steps ~ through ~ of p a r a g r a p h 3 - 8 6 .(g) Remove 10 screws(141 and 148) which secure the frontleft and right hand housing corner posts(138 and 139) to the radi-ator support.(p) Remove 4 screws(140 and 147) which secure th bottomof the left and right hand housing cornerposts (138 and 139) tothe radiator support, and remove corner posts.(q) Remove 6 screws ( 3 1 , f i g . 3 - 2 9 ) , 12 bevel washers (32),washer (33)and nuts (34)which secure the RH and LH radiatorsupports (37 and 38) at the top of the skid base (39).(1) Remove 8 screws(27), 16 washers (28 and 29) and 8 nuts(30)whichsecure the RH and LH racliator supports (37 and 38) tothe sides of skid base (39).(~) Remove radiator assembly (35), RH and LH radiatorsupports (37 and38) and radiator shroud(36) fromskidbase (39).(~) Remove 8 screws and washers ( 7 , 7 A , f i g . 3 - 3 1 ) andnuts (8) which secureradiator (17) and shroud (12) to RH and LHradiator supports (13 and 14) and remove supports.(y) Remove screws (9) and washers (10)which secureradiator 17) to shroud (12)and remove the shroudand radiator.(2) Installation. Install radiator assembly component usingthe removal steps as applicable in reverse order.3 - 1 7 4 . G e n e r a l ( S e e f i g . 1 - 2 8 . )3 - 1 7 3 . H y d r a u l i c C o o l e r.The hydraulic cooler is used on Class 1 sets only.a. Service. To service the hydraulic cooler ( 1 9 , f i g . 3 - 2 9).—proceed as follows:(1) Check that the mounting screws (1.5 and 17) are secure.(2) Clean dirt off fins.~ Replacement. To replace the hydraulic cooler ( 1 9 , f i g . 3 - 2 9)proceed as follows:(1) Removal.(q) Position suitable container to receive hydraulic oildrained from hosesand tubingwhen disconnected.@) Disconnect hose (7) from elbow (8)(g) Remove elbow (8) from connector (9) and removeconnector from flare nut (10).(~) Disconnect hose(11)from connector (12) and removeconnector from adapter (13).(s) Disconnect adapter (13)from return line (14).(~ Remove screw (15) and clamp (16)which secure returnline to RH fan guard (26).@ Remove screw (17) and clamp (18) which secure inputline to LH fian guard (25), and remove hydraulic cooler (19).(2) Installation. Install hydraulic cooler (19) in reverse orderof removal, Replenish hydraulic sump with hydraulic oil.S e c t i o n X X V I . H Y D R A U L I C A C T U A T O R A N D S U M P A N D F I L T ER( M E P 1 0 5 A O N L Y )a. The hydrwdic actuator is utilized on precise enginege;emtor sets. The actuator regulates the engine fuel injectionsystem in order to maintain rated speed for all load conditions.b. The hydraulic sump is mounted on the left side of theengine, on Class 1 precise generatorsets. The sump acts as areservoir for the hydraulic oil pump, used to supply hydraulicpowerto the hydraulic actuator.c. The hydrmdic oil filter is mounted on the sump and providespr%ection against contaminant in the hydraulic oil pressuresystem.3 - 1 7 5 . H y d r a u l i c A c t u a t o r S e r v i c e.a. Disconnect hose ( 6 , f i g . 3 - 3 2 ) from elbow (7) and removeel~ow (7) and packing (8).Q, Disconnect reducer expander (9) w-ith packing (10) fromfilter plug (11).c. Remove filter plug (11) and packing (12) from hydraulicactuator.~, Clean filter plug (11) with cleaning solvent, FederalSpecification P-D-680, and dry thoroughly.e. Inspect filter screen for tears, holes, irregularity of mesh, or—other damage,$ Replace cleaned filter plug (1 1), if serviceable, or install anew plug and reassemble in the reverse order of removal.3 - 8 4C h a n g e 11
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