National Crane Published 10-30-2014 Control # 040-09 5-51
1400H OPERATOR AND SERVICE MANUAL SERVICE
OUTRIGGER DISASSEMBLY
Outrigger wear pads and shims have been calibrated.
Positioning of all wear pads and shims must be noted for
reassembly. If location of shims are unknown or if outrigger
sections are replaced, recalibration will be necessary.
1. Remove the outrigger floats from the jack leg and store.
2. Remove the retaining capscrews attaching the end
cover to the extend cylinder, remove end cover.
3. Remove feed tubes from extend cylinder holding valve
and bulkhead fittings thru access opening after
removing end cover
4. Remove holding valve to allow cylinder rod movement.
Lift cylinder out of anchor pockets in main outrigger box
section with prybar, push cylinder buttplate forward to
keep buttplate from falling back into anchor pocket.
5. Remove and tag top wear pads and shims from the main
outrigger box section. Raise the 1st/ 2nd section
outriggers against the main outrigger box section.
Remove and tag the bottom wear pad and shims from
the main outrigger box section.
6. Mark the position and remove the retaining nuts which
anchor the proportioning cables to the bottom tip of the
main outrigger box section. Route cables back thru
anchor plate and pull ends out between the main box
and the 1st/2nd outrigger assembly
7. Pull the 1st/2nd section outrigger assembly out of the
main outrigger box section. Insure that the intermediate
lock is disabled. Keep the proportioning cables taut to
avoid pinching or damaging the cables during this
operation.
8. Place the 1st/2nd assembly on a suitable horizontal
surface. Take care not to pinch or crush the
proportioning cables while lifting or supporting the
assembly.
9. Using hoist, lift extend cylinder out of anchor pockets in
the 1st section outrigger, and suspend to allow for easy
access to internal components.
10. Remove snaprings from dual cable sheave pin in the
rear of the 1st section. Remove pin and sheave from
section. Route cables back thru opening in the bottom
plate of the 2nd section after sheave removal.
11. Remove the hoses that route oil to the vertical cylinder at
the bulkhead fittings at the rear of the 2nd section.
Remove capscrews clamping the cable anchor together
at the rear of the 2nd section. Remove cable anchor
assembly.
12. Pull extend cylinder out of the 1st/2nd section assembly.
Take care not to pinch or crush hoses or cables during
cylinder removal. Use caution as cylinder is fully
removed from 2nd section, loose parts such as the hose
sheaves can fall off the pin and be damaged.
13. Place cylinder on a suitable horizontal surface, remove
cable sheaves and hose sheaves, remove pin.
14. Mark retaining nut positions on proportioning cables and
remove cables from cylinder butt plate, place cables in
location to avoid damage.
15. Remove and tag side wear pads and shims from the
inner front of the 1st section outrigger. Raise the 2nd
section outrigger against the top pad of the 1st section
outrigger. Remove and tag the bottom wear pad
between the 1st and 2nd outrigger.
16. Pull the 2nd section outrigger out of the 1st section and
place on a suitable horizontal surface. If necessary
remove and tag wear pads and shims from the 2nd
section outrigger.
17. Disassemble the hydraulic feed tubes from the outrigger
jack cylinder holding valve, and remove the tubes from
the 2nd section outrigger.
18. Properly support the outrigger jack cylinder from the
bottom with a floor jack or hoist and remove the holding
valve and O'rings from the outrigger jack cylinder.
19. Remove the capscrews retaining the lock plate on the
jack cylinder, remove lock plate. With the cylinder
supported, slide the retainer plate out from under the
cylinder rod butt plate, lower cylinder out of vertical
outrigger tube, use caution and proper support during
this step.
When the retainer plate is removed, cylinder is free
to drop out of leg assembly.
20. Remove wear rings installed in grooves of lower cylinder
support legs.
CAUTION
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