99903514:TELESCOPIC CRANE: 3A-8
SECTION 3A: CYLINDER REPAIR
20030315
HEAD
SPANNER
WRENCH
TO
TIGHTEN
19. Secure the cylinder and torque the head per the
Head Torque Chart. Use a spanner attachment on a
torque wrench to measure the torque.
HEAD TORQUE CHART
THREAD DIAMETER TORQUE REQ’MENT
2” OD 200-220 ft-lb
2-1/4” OD 225-245 ft-lb
2-1/2” OD 250-270 ft-lb
3” OD 300-320 ft-lb
3-1/4” OD 325-345 ft-lb
3-1/2” OD 350-370 ft-lb
3-3/4” OD 375-395 ft-lb
4” OD 400-420 ft-lb
4-1/4” OD 425-445 ft-lb
4-1/2” OD 450-470 ft-lb
4-3/4” OD 475-495 ft-lb
5” OD 500-520 ft-lb
20. Install the holding valves and their o-rings. The
o-rings must be in good condition and properly
positioned.
NOTE:
CONNECT THE SPANNER WRENCH ATTACHMENT
TO THE TORQUE WRENCH AT 90° TO READ THE
TORQUE DIRECTLY FROM THE TORQUE
WRENCH. IF YOU CONNECT THE ATTACHMENT
AT 180° IN A STRAIGHT LINE, YOU MUST CONVERT
THE TORQUE. DO NOT CONNECT THE TORQUE
WRENCH AT AN ANGLE OTHER THAN 90° OR 180°.
TORQUE CONVERSION FORMULA:
D
d
ACTUAL
TORQUE
=
d
D
1 +
( )
INDICATED
TORQUE
EXAMPLE:
D = Torque wrench handle length
d = 1/2 of pin separation distance + distance from
torque wrench mounting hole to first pin hole
Indicated Torque = Torque reading on torque wrench
If D = 18, d = 3, and the Indicated Torque is 360 ft-lb,
calculate the Actual Torque using the conversion.
1 + d/D = 1 + 3/18 = 1.167
Actual Torque = 360 / 1.167 = 308 ft-lb
Pin Separation
for Cylinder Piston
Pin Separation
for Cylinder Head
Piston Pin Separation Spanner Attachment
Distance Part #
1.25” 60125327
1.56" 60125326
2.00" w/ 1/4” holes 60125325
2.00" w/ 3/8” holes 60125323
2.63" 60125322
3.00" 60125321
3.50" 60125320
4.05" 60125319
4.88” 60125318
5.81” 60125317
Head Pin Separation Spanner Attachment
Distance Part #
2.00” 51718092
2.12” 51718093
2.44” 51718094
2.50” 51718095
2.63” 51718096
2.94” 51718097
3.00” 51718098
3.12” 51718099
3.25” 51718100
3.50” 51718101
4.00” 51718102
4.12” 51718103
4.25” 51718104
4.50” 51718105
4.88” 51718106
5.00” 51718107
5.38” 51718108
5.81” 51718109
7.00” 51718110
7.94” 51718111
APPENDIX: PISTON & HEAD SPANNER
WRENCH ATTACHMENT PART
NUMBERS
Use the pin separation distance on the cylinder head
or piston to determine the spanner wrench attachment
required to torque the head or piston to the correct
torque value.
NOTE:
YOU MUST ATTACH THE SPANNER ATTACHMENT
TO A STANDARD TORQUE WRENCH.
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