Woods BH85 Operator's Manual page 28

Assembly
Lubricate O-rings and seals with clean hydraulic fluid.
Install back-up washer (E) on rod guide (2), then install
O-ring (D) in exterior O-ring groove of rod guide. Install
rod seal (F) into inner groove of rod guide with open
portion of V-groove toward piston.
Place rod wiper (G) in outer rod guide groove. Slide rod
guide assembly (2) onto rod (3). Place wear ring (A) in
narrow groove of piston. Place piston seal (B) in wide
piston groove. Place piston ring (J) in narrow groove in
rod guide.
Lightly coat rod threads with hydraulic oil and slide O-
ring (C) over threads and into groove. Install piston (5)
onto rod (3) with wear ring on side away from rod
guide. Clean threads of rod and apply Loctite
7649 and removable thread locker 243. Install lock nut
(4) and torque to 175 lbs-ft for swing cylinder.
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 (2) into barrel just past
groove inside barrel. Insert retaining ring (K) into
groove and pull rod (1) to seat rod guide (2) against
ring. Screw spanner nut (4) into rod guide (2) using a
spanner wrench, or carefully use a punch and hammer.
Cylinder Disassembly (except swing)
Remove set screw (H) from outside of rod guide (2).
Using a spanner wrench or a hammer and punch,
unscrew rod guide from cylinder barrel. Remove rod
assembly (3) from barrel.
Clamp cross tube of rod assembly in a vise and
remove nut (4) from rod. Remove piston (5) from rod
and slide rod guide off of rod. Remove and discard all
seals, wear rings and O-rings. Clean all components in
A. Wear ring
B. Piston seal
C. O-ring
D. O-ring
E. Backup ring
F. Rod seal
G. Rod wiper
H. Set screw
J. Wear ring
2. Rod guide
3. Rod assembly
4. Nut
5. Piston
28 Dealer Service
solvent and blow dry with low pressure air. Inspect
inside diameter of barrel. Replace cylinder if damaged.
Assembly
For these assembly instructions the front surface of the
threaded rod guide with two holes will be referred to as
the "rod guide face."
Lubricate O-rings and seals with clean hydraulic fluid.
Install back-up washer (E) on rod guide (2), and then
install O-ring (D) in exterior O-ring groove of rod guide.
Make sure that the back-up ring is located closest to
the rod guide face. Place rod wiper (G) in outer rod
guide groove. Install rod seal (F) into the second
groove from the rod guide face with the open portion of
®
primer
V-groove toward piston. Install wear ring (J) in remain-
ing groove. With all rod guide seals installed, slide the
rod guide assembly onto rod (3).
Coat O-ring (C) with oil and slide over rod threads and
install in groove on rod. Slide piston (5) onto rod. Clean
threads of rod and apply Loctite
removable thread locker 243. Install nut (4) and torque
to 275lbs-ft. Install wear ring (A) and piston seal (B)
into grooves on outside of piston. Note that piston seal
consists of two pieces.
Compress wear rings and piston seals and carefully
insert piston and rod assembly into barrel. Use care to
prevent damage while installing. Carefully screw rod
guide (2) into barrel using a spanner wrench, or a
punch and hammer. Align drilled hole in guide and bar-
rel and install new set screw (H).
.
1. Loctite is a registered trademark of the Henkel Loctite
Corporation.
1021841 - Spanner wrench
1021842 - Replacement pin kit
for spanner wrench
Figure 23. Cylinder Assembly
®1
primer 7649 and
MAN1272 (10/22/2019)