23 - 4
Typical Ram
Dismantling and Assembly
The numerical sequence shown on the illustration is intended
as a guide to dismantling.
For assembly the sequence should be reversed.
When Dismantling
Discard all seals and 'O' rings.
!
!
WARNING
If air or hydraulic pressure is used to force out the piston
assembly ensure that the end cap is fitted securely.
Severe injury can be caused by a rod being released
suddenly.
HYD 1-3
When Assembling
Thoroughly clean the threads of piston head
6
, piston rod
2
,
end cap
1
and cylinder with a wire brush. Use new seals and
'O' rings throughout. Ensure that all threads are free from
grease, hydraulic oil and old locking fluids using JCB
Cleaner/Degreaser. Allow solvent to dry for 15 minutes
before applying JCB Activator.
Ensure that lubricants used during assembly do not come
into contact with the locking fluids.
When fitting seal
4A
, ensure that internal seal
4B
remains
seated squarely in its groove and not twisted.
Before fitting the end cap
1
onto the piston rod
2
, wrap tape
around the piston rod threads to protect the gland seal from
damage and the threads from oil and grease.
Apply JCB Activator to the threads of the piston head
6
.
Allow to dry for 15 minutes before bringing into contact with
JCB Threadlocker.
Note:
Threadlocker and Activator must not contact seals,
bearing rings or 'O' rings.
Apply JCB Threadlocker & Sealer (High Strength) to all
threads of the piston rod. Fit and torque-tighten the piston
head.
Taking care to retain the end cap
1
at the further end of the
piston rod from the cylinder, coat the thread of the cylinder
with JCB Activator. Next apply JCB Threadlocker to the
thread of the end cap. Wait 15 minutes before bringing the
two together and then torque-tighten the end cap into the
cylinder.
Note:
If hydraulic oil contacts uncured Threadlocker, a
weakening of the bond will result. Cure times vary according
to the ambient temperature. Allow approximately 1 hour at 20
°C between assembly and filling the ram with oil.
Note:
When fitting cylinder and piston eye bushes
10
, ensure
that the split in the bush is set at 90° to the longitudinal
centreline of the cylinder.
Torque Settings
Item
Nm
kgfm
lbf ft
Lift ram
1
678
69
500
6
405
41
300
Compensating ram
1
450
46
332
6
300
31
221
Crowd ram
1
678
69
500
6
405
41
300
Note:
Cold weather operation. When operating in conditions
which are consistently below freezing, it is recommended
that the rams are operated slowly to their full extent before
commencing normal working.
Section E
Hydraulics
9803/8500
Section E
23 - 4
Issue 4*
Rams
*
Содержание ROBOT 150
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Страница 21: ...5 2 Safety Decals cont d Section 2 Care and Safety 9803 8500 Section 2 5 2 Issue 2...
Страница 77: ...Attachments Section A Section A 7 7 9803 8500 Issue 1 Backhoe...
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Страница 175: ...11 1 Section E Hydraulics 9803 8500 Section E 11 1 Issue 2 Pumps 167750...
Страница 179: ...13 1 Section E Hydraulics 9803 8500 Section E 13 1 Issue 1 Drive Motors 167720 S167720A...
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Страница 183: ...13 5 Section E Hydraulics 9803 8500 Section E 13 5 Issue 1 Drive Motors S243720 X X S243870...
Страница 212: ...18 1 Section E Hydraulics 9803 8500 Section E 18 1 Issue 2 Valves S204980 X X 3 B A 4 2 1 5...
Страница 215: ...20 1 Section E Hydraulics 9803 8500 Section E 20 1 Issue 1 Servo Joysticks S167960...
Страница 217: ...20 3 Section E Hydraulics 9803 8500 Section E 20 3 Issue 1 Servo Joysticks 167950...
Страница 221: ...23 3 Section E Hydraulics 9803 8500 Section E 23 3 Issue 1 Rams S167800...
Страница 241: ...1 2 Section F Transmission 9803 8500 Section F 1 2 Issue 2 Tyres and Wheels 167861 167811...
Страница 243: ...1 4 Section F Transmission 9803 8500 Section F 1 4 Issue 2 Tyres and Wheels 167851...
Страница 253: ...2 1 Section K Engine 9803 8500 Section K 2 1 Issue 1 Removal and Replacement S167990...