HYDRAULIC SYSTEM Assembling the Negative Control Relief Valve 1. Using socket wrench 27 mm, assemble valve washer (2 x 611), springs (2 x 621) and damping rods (2 x 631) together into casing A and casing B. 2. Secure O-ring onto plug. 3. Tighten plug to tightening torque 50.6 ~ 57.8 lb.-ft. (68.6 ~ 78.4 Nm). Assembling the Lock Valve 1. Assemble valve washers and springs. 2. Secure O-rings onto plugs. 3. Using a 10 mm hexagon wrench, install and tighten the plugs to tightening torque 94.0 ~ 108.4 lb.-ft. (127.4 ~ 147.0 Nm). Assembling the e1 Logic Control and Logic Valve 1. Using a 27 mm spanner wrench, tighten hexagon socket head bolts to tightening torque 18.1 ~ 21.7 lb.-ft. (24.5 ~ 29.4 Nm).
ME12002 Assembling the Straight Travel Spool 1. Insert the straight travel spool assembly (305) into casing travel (101). 2. Assemble spring (324), spring (325) and rod (337). 3. Using a 32 mm socket wrench, secure O-ring (265) onto plug (252) and tighten plug (252) to tightening torque 50.6 ~ 57.8 lb.-ft. (68.6 ~ 78.4 Nm).
IMPORTANT:Install the spool assembly into casing travel (101) carefully and slowly to avoid damage. Do not under any circumstances force the spool assembly into casing travel (101). Assembling the Main Spools 1. Hold the middle of each spool (secure into a vice), set spring seats (332), springs and stopper (335).
IMPORTANT:Before tightening the spacer bolt (336), apply adhesive (Loctite #262 or equivalent).
Assembling the Main Relief, Port Relief and Swing Priority Valves
2. Using a 12 mm hexagon wrench, tighten spacer bolt (336) to tightening torque 11.6 ~ 13.0 lb.-ft. (15.7 ~ 17.6 Nm).
1. Install main relief valve, port relief valves and swing priority valve cartridges into the casing and tighten to the specified torque.
3. Assemble the travel, arm 1, boom 1, bucket, boom 2, arm 2, swing and auxiliary hydraulic spools onto the inner and outer springs.
Component Tools
Tightening Torque lb.-ft. (Nm)
4. Carefully insert the previously assembled spool assemblies into their assigned bores within casing A, casing B and casing travel.
Main relief valve
50.6 ~ 57.8 lb.-ft. (68.6 ~ 78.4 Nm)
IMPORTANT:Install spool assemblies into
Spanner wrench 32mm Port relief Socket valve wrench 32mm Swing Socket priority valve wrench 32mm
909768/BP1207
50.6 ~ 57.8 lb.-ft. (68.6 ~ 78.4 Nm)
casing A, casing B and casing travel carefully and slowly to avoid damage. Do not under any circumstances force the spool assembly into the casings.
50.6 ~ 57.8 lb.-ft. (68.6 ~ 78.4 Nm)
152
Printed in U.S.A
