PAIR of lift chains must be installed. Use a
chain scale if one is available to check the lift
chains. If you do not have a chain scale,
measure 20 links of the chain. For ¾ inch
pitch chain, the length of 20 links of new chain
is 15 inches. The wear limit, or maximum
allowable length of 20 links of ¾ inch pitch
chain is 15.45 inches. Replace the pair of
chains if the length of 20 links reaches the
wear limit. Lubricate the chains with clean
SAE 40 motor oil. The best procedure is to
soak the lift chains in motor oil.
WARNING
Never replace just the worn section of a chain;
replace the complete chain. Never replace just
one chain of a pair; install new chains in pairs.
3.
Inspect the chain anchors and pins. Replace
worn or damaged parts.
WARNING
Be careful when cleaning with steam. Steam
can cause serious burns. Wear protective
clothing and gloves. Never expose your skin
to steam.
4.
Clean the mast rails with steam or solvent.
5.
Inspect the load roller contact surfaces for
wear or damage. Inspect all welds for cracks.
Assembly
NOTE
The shims for the load rollers keep the rails
parallel and give correct clearance. During
assembly, the shim arrangement will be
approximately the same as before
disassembly. Check the clearance and adjust
the shims for wear or changes caused by
repairs. See Checks and Adjustments for the
correct procedures.
1.
Put the outer rail on the floor with the back
side down. If removed, install both outer
cylinders in their original locations using spiral
roll pins in the mounts at the bottom of the
outer rail.
2.
Connect a lifting device to the middle rail.
Install the load rollers and shims at the bottom
of the middle rail and top of the outer rail.
3.
Fit the load rollers at the bottom of the middle
rail into the notches at the top of the outer rail.
Slide the middle rail into the outer rail. Adjust
the load rollers as described in Checks and
Adjustments.
4.
Connect the outer cylinder rods to the middle
rail using the screws, washers, spacer
sleeves, and shims noted during disassembly
(do not allow the rod to spin). If either of the
outer cylinders was replaced, see Checks and
Adjustments to determine if shims are
needed. If removed, connect the hydraulic
tubes and fittings between the lift distributor
block and the outer cylinders. Make sure the
arrows on the flow fuses point away from the
cylinder ports.
5.
Connect a lifting device to the inner rail.
Install the load rollers and shims at the bottom
of the inner rail and the top of the middle rail.
6.
Fit the load rollers on the inner middle rail into
the notches at the top of the middle rail. Slide
the inner rail into the middle rail. Adjust the
load rollers as described in Checks and
Adjustments.
7.
Connect the lift chains to the chain anchors at
the top of the outer rail and bottom of the
inner rail. Install the chain and hose sheaves
at the top of the middle rail.
8.
Connect the center cylinder feed hoses and
auxiliary (sideshift) attachment feed hoses to
the outer rail. Route the hoses over the hose
sheaves on the middle rail and connect them
to the inner rail.
9.
Install the center cylinder in the mount on the
inner rail. Install the cylinder strap and the
snap ring. Install the tube between the center
cylinder and the distributor block. Make sure
the arrow on the flow fuse points away from
the cylinder port.
10. Connect the free-lift chains to the anchors at
the middle crossbar of the inner rail.
11. The carriage may be installed at this time
(refer to Carriage installation procedure).
Installation
1.
Connect a lifting device to the top of the mast
using chains. Make sure all the rails are
fastened together and that the chains will not
damage the sheaves, hoses, or other parts of
the mast. The lifting device must have a
capacity of at least 2500 lb (1150 kg).
2.
Use the lifting device to set the mast on the
pivot points. Install the mast mount caps and
grease the bearings.
E
lectric
C
ounterbalance
H
igh
O
utput
Elevating
3/10/00
7.7
