© Titan Tool Inc. All rights reserved.
27
IMPORTaNT: use of non-Titan manufactured service parts
may void warranty. This motor contains hydraulic fluid.
Take precautions to protect the immediate area from oil
damage upon disassembly.
IMPORTaNT: Disassemble this motor in a clean, dust free
area. any dust or dirt contamination of this assembly will
shorten the service life of this motor and the hydrapac rotary
pump.
1. Release set screw (26) and remove coupling nut (27).
Push out nylon button (26).
2. Remove reset assembly (1) and O-ring (2).
3. Unthread connector nuts (35, 37) and release tube (36).
4. Unscrew upper stanchion nuts (8), remove washer (9).
5. Raise cylinder head (15) high enough to secure the shifter
actuator rod (19) with vise grips. Place a socket wrench
on the lock nut (3).
6. Unthread the lock nut (3).
7. Lift cylinder head (15) from upper motor stanchions (14).
Remove O-ring (11) and back-up ring (10).
8. Carefully lift cylinder (28) and piston tube assembly (25)
from motor base (30). Separate the cylinder and piston
tube assembly. Remove O-ring (11) and back-up ring (10)
from motor base. Remove cushion gasket (29).
9. Remove piston seal (22) and wear ring (20).
10. Remove piston tube seal (31), wear ring (32) and wiper
(33) from motor base (30).
Disassembly of cylinder head and shifter actuator
rod
1. Remove trip retainers (7) along with O-rings (6), trip
springs (5) and balls (4) from cylinder head (15).
2. Remove snap ring (18) with snap ring pliers.
3. Carefully lift out valve spool (12) with needle nose pliers.
4. Using a nylon rod or spool drive from the top, push the
valve sleeve (12) straight out of the cylinder head (15).
5. Place piston tube assembly (25) in horizontal position with
bottom of assembly into heavy-duty vise.
IMPORTaNT: DO NOT mar chromed surface.
Support the piston tube assembly (25) in the horizontal
position with wood blocks and grip the flats of piston (21)
with a 2 1/4” flat wrench to unthread piston.
Reassembly
Wash all parts thoroughly with Coolflo™, part # 430-361. For
routine servicing, use all new parts from Motor Service Kit, minor,
part # 441-071.
For major overhaul, replace all parts contained in Motor Service
Kit, major, part # 441-701. Inspect all other parts for abnormal
wear or damage and replace if necessary.
1. Install new lower piston tube seal (31) in motor base (30).
Install new O-ring (11) and new back-up ring (10) in motor
base (30).
2. Slide piston tube assembly (25) into motor base from
below.
3. Place new O-ring (23) and new back-up ring (24 onto
piston (21).
4. Clean and coat the threads of the piston (21) with Loctite
sealant, part # 426-051, and place shifter actuator
assembly (19) with piston (21) into piston tube.
IMPORTaNT: DO NOT mar chromed surface.
5. Place new piston seal (22) and new wear ring (20) on
piston (21).
6. Push piston tube to the top of its stroke and place cylinder
(28) over piston tube and seat the cylinder (28) on the
motor base (30) over the new cushion gasket (29).
7. Push the valve sleeve and spool (12) straight into the
cylinder head (15).
8. Place spacer (17) behind the valve sleeve and spool
assembly (12).
9. Insert snap ring (18) to hold spacer (17) in place.
10. Place new O-ring (11) and new back-up ring (10) on
cylinder head (15) and lower cylinder head on to cylinder
(28), shifter actuator assembly (19) and upper stanchions
(14) with washers (9).
11. Raise the cylinder head (15) to apply vise grips to the
shifter actuator rod (19). Pass the shifter actuator rod
through the valve spool (12). Clean and Loctite the shifter
rod threads and install and tighten lock nut (3).
12. Thread reset assembly (1) with new O-ring (2) into
cylinder head (15), insert new balls (4), new springs (5),
and replace trip retainers (7) together with new O-rings (6)
into cylinder head (15).
13. Place stanchion nuts (8), washers (9) on upper stanchions
(14). Tighten stanchion nuts (8) alternately.
14. Attach tube (36) to tee assembly (35) and elbow (37) by
tightening connector nuts.
NOTE: areas where Loctite sealant is applied must be
free of oil and grease.
Service Kits
Motor Service Kit, Minor
Part No. 441-071
ITEM
NO.
PaRT
NO.
DEScRIPTION
QTY.
2
441-217 O-ring
1
3
858-811 Nut
1
4
569-016 Ball, S.S.
2
5
441-005 Spring, trip
2
6
141-007 O-ring
2
10
441-149 Ring, back-up
2
11
441-148 O-ring
2
13
441-152 O-ring
3
20
441-238 Ring, wear
1
22
441-249 Seal, piston
1
23
441-026 O-ring
1
24
441-024 Ring, back-up
1
29
441-151 Gasket, cushion
1
31
441-234 Piston, tube seal
1
32
445-237 Ring, wear
1
426-051
Loctite sealant
1
Motor Service Kit, Major
Part No. 441-701
ITEM
NO.
PaRT
NO.
DEScRIPTION
QTY.
441-071 Motor service kit, minor
1
12
441-908
Valve spool / sleeve set
1
19
441-377 Shifter actuator assembly
1
