JLG 10MSP Service And Maintenance Manual page 36

Mast Section-1 - Disassembly Mast Section-1 - Disassembly
1. 1. Rem Remove t ove the fo he four (4 ur (4) larg ) large scr
attaching the lift cylinder mounting block to mast attaching the lift cylinder mounting block to mast
section-1. Slide the cylinder out of the mast section section-1. Slide the cylinder out of the mast section
and move to a suitable work surface. and move to a suitable work surface.
2. 2. At th At the top e top end o end of mas f mast sect
attaching the chain anchor block to the mast and attaching the chain anchor block to the mast and
remove chain/anchor block assemblies from the remove chain/anchor block assemblies from the
mast and lay aside. mast and lay aside.
3. 3. Remov Remove sli e slide pa de pads an ds and shi
if necessary. if necessary.
Mast disassembly should now be complete. Mast disassembly should now be complete.
5. 5.9 9 CY CYLIN LINDE DER R DI DISA SASS SSEM
(See (See Figure 5-3. Figure 5-3. ) )
1. 1. Befor Before dis e disassemb assembling ling the c
dirt and foreign substances from openings, particu- dirt and foreign substances from openings, particu-
larly the head area. larly the head area.
NOTE: NOTE: Always protect the chrome surface of the cylinder Always protect the chrome surface of the cylinder
rod during assembly and disassembly. Any damage rod during assembly and disassembly. Any damage
to this surface will require replacement of the rod. to this surface will require replacement of the rod.
2. 2. Exte Extend th nd the rod e rod until until the p the piston
the cylinder head. the cylinder head.
3. 3. Comp Compress t ress the he he head ret ad retraini
the cylinder head to be removed. the cylinder head to be removed.
4. 4. Caref Carefully s ully slide lide the he the head/ro
the cylinder tube. A gentle tap on the head assembly the cylinder tube. A gentle tap on the head
may be required to remove the head from the cylin- may be required to remove the head from the cylin-
der tube. der tube.
5. 5. Place Place the the head/r head/rod/p od/piston
that will not damage the chrome. that will not damage the chrome.
6. 6. Remov Remove the e the pisto piston loc n locknut
from the rod. from the rod.
7. 7. Slide Slide the h the head o ead off th ff the rod e rod from
NOTE: NOTE: When removing the old seals use only blunt tools, be When removing the old seals use only blunt tools, be
sure there are no sharp edges that may damage the sure there are no shar
seal grooves during removal. Scratching the groove seal grooves during removal. Scratching the groove
may cause by-pass. may cause by-pass.
8. 8. Rem Remove ove and and dis discar card al d all ol
3 3 1 1 2 2 1 1 2 2 2 2 8 8
e screws (2 e ews (2 each s ach side ide) )
t section-1 ion-1, remo , remove the ve the pin pin
d shims f ms from m rom mast se ast section ction-1, -1,
EMBL BLY Y
the cylind ylinder er, clea , clean away n away all all
iston bott bottoms o oms out ag ut against ainst
raining ri ng ring en ng enough ough to al to allow low
ad/rod/pis d/piston ton assemb assembly o ly out of ut of
assembly
iston assemb assembly o ly on a n a surfa surface ce
knut and s and separa eparate th te the pis e piston ton
from the p the piston iston end. end.
p edges that may damage the
l old se d seals als. .
– – J J L L G G L L i i f f t t – –
SECTION 5 - MAST COMPONENTS SECTION 5 -
1 1
3 3
4 4
5 5
6 6
8 8
9 9
1 1 0 0
1 1 1 1
1 1 3 3
Figure 5-3. Lift Cylinder Figure 5-3. Lift Cylinder Component Cross-Section. Component Cross-Section.
1. 1. Cylinder Cylinder Rod Rod 6. 6. Apply Apply Anti-Seize Anti-Seize 10.
2. 2. Cylinder Cylinder Head Head 7. 7. Cylinde Cylinder r Tube Tube
3. 3. Rod 8. 8. Spacer
Rod Wiper Wiper Spacer
4. 4. Rod Rod Seal Seal 9. 9. Piston Piston Seal Seal
5. 5. O-Ring O-Ring
Note: Note: (a) - T (a) - Torque 100 - 120 orque 100 - 120 ft. lbs. ft. lbs.
MAST COMPONENTS
2 2
7 7
1 1 2 2
10. Piston Piston
11. 11. Wear Wear Ring Ring
12. 12. Piston
Piston O-Ring O-Ring
13. Piston Lock 13. Piston Lock Nut (a) Nut (a)
5-9 5-9