Dealer Service - Woods BH6500 Operator's Manual

1. Piston rod
3A. O-Ring
3B. Retaining ring
3C. Wiper ring
3D. Rod seal
3E. Back-up washer
3F. O-Ring
3G. Piston ring
3I. Piston wear ring
4. Spanner nut
5. Rod guide assembly
6. Piston
7. Locknut
8. Cylinder barrel
Clamp cross pin end of rod assembly (1) in a vise with
protective jaws. Remove locknut (7) from rod assem-
bly. Remove piston (6) and rod guide (5) from rod.
Remove and discard all seals, wear rings and O-rings.
Clean all components in solvent and blow dry with low
pressure air.
Assembly
Lubricate O-rings and seals with clean hydraulic fluid.
Install back-up washer (3E) on rod guide (5), then
install O-ring (3F) in exterior O-ring groove of rod
guide. Install rod seal (3D) into inner groove of rod
guide with open portion of V-groove toward piston.
Place rod wiper (3C) in outer rod guide groove. Slide
rod guide assembly (5) onto rod (1). Place wear ring
(3I) in narrow groove of piston. Place piston seal (3G)
in wide piston groove.
Lightly coat rod threads with hydraulic oil and slide O-
ring (3A) over threads and into groove. Install piston (6)
onto rod (1) with wear ring on side away from rod
guide. Install locknut (7) and torque to 175 lbs-ft.
Compress wear ring and piston seal and carefully
insert piston and rod assembly into barrel. Use care to
prevent damage while installing.
Carefully push or tap rod guide (5) into barrel (8) just
past groove inside barrel. Insert retaining ring (3B) into
groove and pull rod (1) to seat rod guide (5) against
ring. Screw spanner nut (4A) into rod guide (5) using a
spanner wrench, or carefully use a punch and hammer.

24 Dealer Service

8
3I
7
Figure 16. Hydraulic Cylinder Assembly
3G
3F
6
5
3A
Swing Cylinder
Disassembly
Remove hex nuts (4) from tie rods (2). Remove both
piston rod guides (5) from barrel (6).
Remove and discard rod wiper and seal (3A & 3B) from
each piston rod guide.
Remove rod assembly (7) from barrel (6). Remove and
discard seals.
Clean all components in solvent and blow dry with low
pressure air.
Assembly
Lubricate seals and wipers with clean hydraulic fluid.
Install piston seal (3E) in piston groove.
Carefully insert piston and rod into barrel. Piston seal
must be compressed when inserting.
Place back-up ring (3F), if required, into groove on pis-
ton rod guide (5), then install O-ring (3C) into groove.
Install rod seals (3B), with V-groove toward piston, into
each piston rod guide outer groove.
When installing piston rod guides to barrel, make sure
chain fastening lugs are positioned properly. With cylin-
der in front of you, place right rod guide with chain lugs
on bottom and left rod guide with chain lugs on top.
Insert the four tie rods (2) with rod guide chain hole
center lines parallel. Torque nuts to 40-45 lbs-ft.
3E
3B
4
3C
3D
1
CD4687
37541 (Rev. 1/30/2004)