Usage:
1. Lift the bucket and put tooling (A) in position under the lift arm for support. Move the control lever and lower the weight of the lift arms and bucket on tooling (A) as shown.
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Stop the engine, move all control levers backward and forward to release the pressure in the hydraulic system. Slowly loosen the cap to release any pressure in the hydraulic tank. Let the hydraulic oil become cool before any lines are disconnected in the hydraulic system. |
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VIEW FROM UNDER MACHINE
2. Disconnect hose assemblies (1) and (2) from inside the front frame.
3. Remove bar (3) that holds the rod pin.
4. Fasten a hoist to the lift cylinder.
5. If necessary use tool (B) to clean the threads of the rod pin.
6. Install tool (C) and remove the rod pin from inside of the lift arm.
7. Remove bar (4) that holds the cylinder pin in the frame.
8. If necessary use tool (B) to clean the threads in the cylinder pin (5). Use tool (C) and remove the cylinder pin.
9. Remove the lift cylinder. The weight of the cylinder is 168 lb. (76 kg).
Install Lift Cylinders
1. Pull the rod (1) almost all of the way out of the cylinder.
2. Fasten a hoist to the lift cylinder and put it in position on the machine.
3. Install pins (2) and (3) to hold the cylinder in position. Install the bars to hold pins (2) and (3).
VIEW FROM UNDER MACHINE
4. Put clean hydraulic oil on the O-ring seals and connect hose assemblies (4) and (5) to the lift cylinder.
5. Put clean grease in the cylinder pins.
6. Remove tooling (A) from under the lift arms and lower the bucket to the ground.
7. Fill the hydraulic system with oil to the correct level.
Disassemble Lift Cylinders
start by:
a) remove lift cylinders
1. Fasten a hoist to the lift cylinder and put it in position on tooling (A).
2. Remove tube assemblies (1) and (2) from the cylinder assembly.
3. Remove seals (3) from each side of the rod assembly.
4. Use tooling (B) to pull the bearing out of the rod assembly.
5. Remove seals (4) from each side of the cylinder assembly.
6. Use tooling (C) to pull the bearings and spacer from the cylinder assembly.
7. Make sure support (6) is in position under the rod and fasten strap (5) around the rod to hold it.
8. Put a mark on the head and cylinder assembly for correct alignment at assembly. Remove four bolts (7).
9. Pull the cylinder away from the rod and head with tooling (A).
10. Use tooling (D) to remove the nut that holds piston (8) on the rod. Remove piston (8) from the rod.
11. Remove wear ring (9) and seal assembly (10) from the piston.
12. Remove head (11) from the rod.
13. Remove the back-up ring and O-ring seal (12) from head (11).
14. Remove three seals (13) from head (11).
Assemble Lift Cylinders
TYPICAL EXAMPLE
1. Use tool (A) to install seal (4) in head (1).
2. Install seal (3) in the head with the lip of the seal toward seal (4).
3. Use tool group (B) to install seal (2) in the head with the lip of the seal toward the outside.
4. Install O-ring seal (6) and back-up ring (5) in the head as shown.
5. Put the cylinder assembly and rod on tooling (E).
6. Install tool (C) on the rod. Put clean hydraulic oil on the lips of the seals in the head. Push the head on the rod. Remove tool (C) from the rod.
7. Use tool (D) to cause expansion of the plastic seal (7) of the piston seal assembly.
8. Install the rubber expansion ring in the groove of the piston and install plastic seal (7) over the rubber expansion ring.
9. Install wear ring (9) on the piston. Install piston (8) on the rod as shown.
10. Use tooling (F) to tighten the nut that holds the piston on the rod. Tighten the nut to a torque of 1200 ± 120 lb.ft. (1620 ± 160 N·m).
11. Put clean hydraulic oil on the seal and wear ring on the piston and on the back-up ring and O-ring seal on the head.
12. Make an alignment of the marks on the head and cylinder assembly. Slowly push the cylinder assembly on to the piston and head with tooling (E). Be careful not to damage the O-ring seal and the back-up ring on the head.
13. Make sure the rod is fully extended from the cylinder assembly and tighten the bolts that hold head (1).
14. Remove the cylinder assembly from tooling (E).
15. Use tooling (G) to pull a bearing in the cylinder assembly bore until it is .312 in. (7.92 mm) from the surface of the cylinder assembly.
16. Turn the cylinder assembly over the use tooling (G) to pull the spacer and second bearing in the cylinder assembly bore until the spacer makes contact with the first bearing installed.
17. Use tooling (H) to pull the bearing into the rod assembly until it is in the center of its bore.
18. Use tool group (B) to install the seals in the cylinder and rod assemblies until the seals make contact with the bearings.
NOTE: The lip of the seals must be toward the outside as shown.
19. Put clean hydraulic oil on the O-ring seals and install tube assemblies (10) and (11) on the cylinder assembly.
end by:
a) install lift cylinders