FOR FURTHER MAINTENANCE INFORMATION CONTACT
YOUR NEAREST REPRESENTATIVE OR
MOOG FLO-TORK, ORRVILLE, OHIO 44667
Moog Flo-Tork
1701 N. Main St. P.O. Box 68, Orrville, Ohio 44667-0068
PHONE: 330-682-0010 FAX: 330-683-6857
DISASSEMBLY
NOTE:
DO NOT REMOVE CUSHION NEEDLE WHILE UNIT IS
UNDER PRESSURE.
1. Remove cushion needle jam nut and cushion needle from
cylinder head.
2. Remove O-ring and back-up ring. Replace with new parts during
re-assembly.
3. Remove cylinder head.
4. Remove cushion check retaining ring from piston rack.
5. Remove cushion check retainer, cushion check and compression
spring from piston rack.
6. Thoroughly clean and inspect all parts for wear or damage, replace
parts as required.
RE-ASSEMBLY
1. Install compression spring, cushion check, and cushion check retainer
in piston rack.
2. Secure in place with the retaining ring.
3. Install new back-up ring on cushion needle making sure the curved
side faces toward the needle end.
4. Install a new O-ring on the cushion needle making sure the O-ring fits
into the curved side of the back-up ring.
5. Re-install cylinder head.
6. Insert the cushion needle in the cylinder head, being careful not to
damage the seals. Tighten as far as possible, then loosen 1/2 turn.
7. Install jam nut.
8. Adjust cushion during testing as follows:
NOTE:
DO NOT ADJUST WHILE UNIT IS UNDER PRESSURE.
A. Control needles of the cushion are installed and locked 11/2 turns
from closed when assembled at the factory to prevent premature
damaging of the actuator during installation and start-up.
B. Increase cushioning – loosen cushion needle jam nut 1/2 to 1 turn.
Turn cushion needle clockwise 1/8 turn. Lock jam nut and check
cushion action.
NOTE:
NEVER COMPLETELY CLOSE CUSHION NEEDLES.
C. Decrease cushioning – loosen cushion needle jam nut 1/2 to 1 turn.
Turn cushion needle counter-clockwise 1/8 turn. Lock jam nut and
check cushion action.
NOTE:
CAUTION IS TO BE TAKEN WHEN ADJUSTING THE CUSHION
NEEDLE THAT IT HAS ADEQUATE THREAD ENGAGEMENT AND
WILL NOT BLOW OUT OF HOLE.
D. Continue adjusting cushion needles in the above described
manner until the desired cushioning effect is obtained.
SEAL LEAKAGE
MOOG FLO-TORK ROTARY ACTUATORS MAY BE CHECKED FOR PISTON SEAL LEAKAGE AS FOLLOWS:
1. SET UP ACTUATOR WITH RELIEF FITTING UP.
2. PRESSURIZE CYLINDER PORTS INDIVIDUALLY.
3. IF OIL FLOWS FROM RELIEF PORT AFTER PISTON RACK HAS COMPLETED ITS TRAVEL AND IS HELD FOR 3 MINUTES UNDER PRESSURE, ALL PISTON SEALS
SHOULD BE REPLACED.
ITEM
QTY
PART NAME
64
1
CUSHION PISTON RACK
66
1
CUSHION CYL. HEAD - ADJUSTABLE
67
1
COMPRESSION SPRING
68
1
CUSHION CHECK
69
1
RETAINING RING
73
1
O-RING - CUSHION NEEDLE
74
1
BACK-UP RING - CUSHION NEEDLE
75
1
CUSHION NEEDLE
76
1
CUSHION CHECK RETAINER
77
1
JAM NUT
ALWAYS USE SERIAL NUMBERS AND MODEL NUMBERS WHEN ORDERING PARTS.
ADJUSTABLE CUSHION (MODELS 900-30,000)
