© Titan Tool Inc. All rights reserved. 7
Air Motor Assembly Service Instructions
Service Procedure
This Air Motor requires a normal maintenance and service
inspection at 1500 hours usage. Service procedure includes
replacement of the Motor Service Kit, Minor # 525-051 listed
below. It is suggested that one Motor Service Kit, Major # 525-
501 (which includes the minor kit) be kept on hand for normal
maintenance and emergency repairs.
Warranty Information
This Air Motor is covered by the standard Titan Warranty against
defective material and workmanship for a period of one (1) year.
This warranty excludes expendable parts such as gaskets,
O-rings, and rubber parts which will deteriorate with normal wear.
Warranty card must be returned. See reference to use Automatic
Lubricator or daily lubrication.
Warranty will not be extended for damage to any parts resulting
from failure to operate or maintain the equipment according to the
instructions and routine maintenance recommendations.
Maintenance
The 525 Air Motor should be served with moisture-free air if
possible, and for this, a water trap such as Titan model 141-
157 is recommended. For use under very cold and humid air
conditions coupled with high speed and high operating pressure,
a Moisture Separator and an Automatic Lubricator may be
necessary to avoid icing. Air Line Filter / Moisture Separator
should be drained as needed.
Fill Automatic Lubricator, part # 151-155, with AirCare™ Air
Motor Lubricant, part # 311-101. Automatic Lubricator should be
set to provide one drop every 90-125 cycles. In cold weather,
when icing may occur, increase to one drop every 50-60 cycles.
Disassembly Procedure
1. Disconnect air line (23) from elbow (13) and elbow (17).
2. Remove locking bolts and stop nuts (10, 12), the trip
spring retainers (3), O-rings (4), trip springs (5) and valve
balls from both sides of the cylinder head (2).
3. Remove four jam nuts (7) and four bolts (1).
4. With piston (30) in down position, place wrench on ats
of piston rod (33) and disconnect piston rod from pump
connecting rod.
5. With piston (30) at top of stroke, raise cylinder head (2)
and remove retainer clip (26). Lift off cylinder head (2).
Valve sleeve (14) may pull out of cylinder head. If so, lift
valve sleeve (14) off separately.
6. Remove stop nut (18) and then unthread upper valve
keeper (19).
7. Remove air valve (20) followed by lower valve keeper (22)
and bushing (23).
8. If valve sleeve is still in cylinder head, leave it there unless
it is necessary to change O-rings. To remove, insert head
of bolt (1) into large hole in valve sleeve (14) and pull it out
very carefully.
9. Remove cylinder (35).
10. Remove piston rod (33) and piston from motor base (37).
11. Secure piston (30) in vise and remove piston nut (27) and
piston washer (28).
12. Remove valve rod assembly (29) and valve trip collar (32).
13. Unscrew piston rod (33) from piston (30).
14. Remove O-ring (31) from piston (30).
15. Remove O-rings (24, 25) from bushing (23) and O-ring
(36) from motor base (37).
Reassembly procedure
Wash all replaceable parts thoroughly with kerosene and
lubricate with Lubri-Plate or similar non-water soluble grease.
For routine servicing, use new parts from #525-051 Air Motor
Service Kit. For major overhaul, replace all parts contained in
the 525-501 Air Motor Service Kit. Inspect all other parts for
abnormal wear or damage and replace if necessary.
1. Install new O-ring (34) into motor base (37) and new
O-rings (24, 25) into bushing (23). Use care to avoid
damaging O-rings and make sure they are properly seated
in the O-ring grooves.
2. Place valve trip collar (32) into piston (30). Replace piston
nut (27) and piston washer (28).
3. Screw piston rod (33) into piston (30). Replace piston nut
(27) and piston washer (28).
4. Install piston O-ring (31) into piston (30).
5. Place new gasket (34) into position in motor base (37).
6. Place piston assemble (30, 33) into motor base (37). Use
care not to damage O-ring (36).
7. Place new valve O-rings (21) on air valve (20).
8. Mount air valve assembly (20) onto valve rod assembly
(29), followed by lower valve keeper (22), air valve (20),
and upper valve keeper (22) which should be threaded
down on air valve hand-tight, and then loosened
approximately 1/4 turn or .009” gap. Place wrench on
ats of valve rod (29) and hold to prevent valve rod from
turning. Thread stop nut (18) down on valve rod (29) to
lock upper valve keeper (22) in position. Be sure upper
valve keeper (22) does not change position.
9. Grease inside of cylinder (35) and work cylinder down over
piston gently in order to avoid damage to piston O-ring
(31).
10. Install new O-rings (15) on valve sleeve (14). Grease
valve sleeve and install into cylinder head (2) to large
holes in the valve sleeve line up with trip retainer holes in
the cylinder head (2). Put one trip retainer (3) with O-ring
(4) into cylinder head (2) without ball (6) or trip spring (5)
and hold in position temporarily with locking bolt (12) and
stop nut (10).
11. Place new gasket (34) into position in cylinder head and
hold with grease.
12. Carefully position air valve assembly (20) up into cylinder
head (2).
13. Push bushing (23) into bottom of cylinder head (2)
sufciently to permit installation of retainer clip.
14. To install trip spring retainer (3), be sure one of the detents
of air valve (20) is properly lined up with hole in cylinder
head (2). Place O-ring (4) onto remaining trip spring
retainer (3). Install valve ball (6) followed by trip spring (5)
and trip spring retainer (3) into hole in cylinder head (2).
Lock into position with bolt (12) and stop nut (10).
15. Remove opposite trip spring retainer (3) and repeat step
#14.
16. Connect air line (16) to elbows (13, 17).
17. Replace bolts (1) and jam nuts (7). Always tighten nuts
180 degrees apart in order to obtain proper and even
compression. Do not over-tighten.
18. Place wrench on the ats of the piston rod (33) and
connect pump connecting rod.
