Loader Bobcat 853, 853H. Service Manual - part 16

TS–01060

HYDRAULIC CYLINDER

Lift Cylinder Identification

  1.  Tube
  2.  O–ring
  3.  Plug
  4.  Case
  5.  O–ring
  6.  Nut
  7.  Piston
  8.  Ring

  9.  O–ring
10.  Spacer
11.  O–ring
12.  Washer
13.  Head
14.  Seal
15.  Seal
16.  Rod

10

9

8

6

7

4

16

15

14

13

12

11

3

2

3

2

1

5

853, 853H Loader

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Service Manual

TS–01098

HYDRAULIC CYLINDER (Cont’d)

Tilt Cylinder Identification

  1.  Case
  2.  Tube
  3.  Plug
  4.  O–ring
  5.  Clamp
  6.  Nut
  7.  Nut
  8.  Piston
  9.  Seal
10.  O–ring

11.  Seal
12.  Washer
13.  O–ring
14.  Head
15.  Seal
16.  Seal
17.  Rod
18.  Bushing

MC–01688

MC–01688

8

9

10

11

12

13

14

2

15

18

1

5

7

3

4

6

16

17

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853, 853H Loader

Service Manual

HYDRAULIC CYLINDERS (Cont’d)

Disassembly

Use the following tools to disassemble the cylinder:

MEL1074 – O–ring Seal Hook
Spanner Wrench

The lift and tilt cylinders internal components are similar,
the differences are listed below:

Tilt rod diameter is larger.
Piston relief area is slightly different.
No spacer in the tilt cylinder.

Hold the hydraulic cylinder over a drain pan and move the
rod in and out slowly to remove the fluid from the cylinder.

Put the base end of the cylinder in a vise.

Use a spanner wrench to loosen the head [A] & [B].

Lift Cylinder: Remove the head and the rod assembly
from the cylinder [C]. Put the rod end in a vise.

Lift Cylinder: Remove the nut (Item 1) [C], piston (Item 2)
[C], spacer (Item 3) [C] (if so equipped) and head (Item
4) [C].

Tilt Cylinder: Remove the head and rod assembly from
the cylinder [D]. Put the rod end in a vise.

Tilt Cylinder: Remove the nut (Item 1) [D], piston (Item 2)
[D] and head (Item 3) [D].

A

P–07429

C

P–07428

4

3

2

1

D

P–07434

3

2

1

853, 853H Loader

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Service Manual

B

P–07435

HYDRAULIC CYLINDERS (Cont’d)

Disassembly (Cont’d)

Standard Piston: Remove the seal (Item 1) [A], and
O–ring (Item 2) [A] from the piston (Item 3) [A].

Cushion Piston: Remove the seal (Item 1) [B], and O–ring
(Item 2) [B] from the piston (Item 3) [B].

Remove the thick O–ring (Item 1) [C], and the back–up
washer (Item 2) [C] from the groove in the head. Remove
the thin O–ring (Item 3) [C].

Remove the wiper seat (Item 1) [D], and rod seal (Item 2)
[D].

Remove the O–ring (Item 3) [D] from the rod seal.

A

P–07430

3

2

1

C

P–07422

1

3

2

D

P–07426

1

2

3

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853, 853H Loader

Service Manual

B

P–07439

2

1

3