TX / TXH / TXB 180S - 400L (Rev. 4/23/07)TX / TXH / TXB 180S - 400L (Rev. 4/23/07)
27-227-2
odically (refer to theodically (refer to the Preventive MaintenancePreventive Maintenance
chart in thechart in the AppendicesAppendicesfor lubrication interval).for lubrication interval).
Lubrication.Lubrication. Refer to theRefer to the LubricationLubrication section insection in
thethe AppendicesAppendicesfor information on the lubricationfor information on the lubrication
of the mast assembly.of the mast assembly.
Slide Bearing Blocks Slide Bearing Blocks ShimmingShimming (Illustration(Illustration
27-1)27-1).. The slide The slide bearing block bearing block life depends life depends on theon the
duty cycle and duty cycle and operation of the toperation of the truck. ruck. PeriodicallyPeriodically,,
the slide bearing blocks may require shimming tothe slide bearing blocks may require shimming to
adjust for wearadjust for wear. . TTo prevent undue flexing of theo prevent undue flexing of the
inner mast on a telescopic mast assembly, it isinner mast on a telescopic mast assembly, it is
essential for all slide bearings to be properlyessential for all slide bearings to be properly
shimmed. shimmed. The correct The correct procedure is procedure is outlined here.outlined here.
This method is to be used for fork lifts equippedThis method is to be used for fork lifts equipped
with Ultra-Vu telescopic masts.with Ultra-Vu telescopic masts.
1.1. RaiRaise thse the care carriariage to age to allollow enow enough rough room toom to
ance is 1/16 to ance is 1/16 to 1/32 inch (1.6 t1/32 inch (1.6 to .8 mm). o .8 mm). (See(See
NOTENOTE below procedure 5.)below procedure 5.)
2.2. RaiRaise the cse the carrarriage uiage untintil the tol the top carrp carriagiage slide slidee
bearings are aligned with the outer mast slidebearings are aligned with the outer mast slide
bearings. bearings. Pry the Pry the carriage from carriage from side to side to sideside
and measure and measure the movementthe movement. . The carriageThe carriage
and inner mast should then be secured inand inner mast should then be secured in
position by an appropriate means or they canposition by an appropriate means or they can
be lowered to a height where they can morebe lowered to a height where they can more
easily be blocked in position and shimmed.easily be blocked in position and shimmed.
Calculate the thickness of the shims neededCalculate the thickness of the shims needed
by subtracting 1/32 inch (.8 mm) from the dis-by subtracting 1/32 inch (.8 mm) from the dis-
tance the carriage moved and shim the toptance the carriage moved and shim the top
carriage carriage slide slide bearings. bearings. (See(SeeNOTENOTE belowbelow
procedure 5.)procedure 5.)
3.3. RaiRaise the cse the carrarriagiage untie until the botl the bottom catom carrirriageage
slide bearings are aligned with the outer mastslide bearings are aligned with the outer mast
slide bearings. slide bearings. Pry the Pry the carriage from side carriage from side toto
side and mside and measure the easure the movement. movement. The car-The car-
riage and inner mast should then be securedriage and inner mast should then be secured
in position by an appropriate means or theyin position by an appropriate means or they
can be lowered to a height where they cancan be lowered to a height where they can
more easily be blocked in position andmore easily be blocked in position and
shimmed. shimmed. Calculate the Calculate the thickness thickness of theof the
shims needed by subtracting 1/32 inch (.8shims needed by subtracting 1/32 inch (.8
mm) from the distance the carriage moved andmm) from the distance the carriage moved and
shim the shim the bottom cbottom carriage slide arriage slide bearings. bearings. (See(See
NOTENOTE below procedure 5.)below procedure 5.)
4.4. AliAlign the bgn the bottottom caom carrirriage slage slide beide beariarings anngs andd
the inner mast the inner mast top slide bearings. top slide bearings. Pry thePry the
inner mast from side to side (this must beinner mast from side to side (this must be
done from the rear of the mast) and measuredone from the rear of the mast) and measure
the movement. the movement. Calculate the Calculate the thickness of thickness of thethe
shims needed by subtracting 1/32 inch (.8shims needed by subtracting 1/32 inch (.8
mm) from the distance the inner mast moved.mm) from the distance the inner mast moved.
Raise the carriage to allow access to the innerRaise the carriage to allow access to the inner
mast top mast top slide bearings. slide bearings. The carriage The carriage andand
inner mast should then be secured in positioninner mast should then be secured in position
by supporting with an appropriate means.by supporting with an appropriate means.
(See(SeeNOTENOTE below procedure 5.)below procedure 5.)
5.5. AliAlign the bgn the bottottom caom carrirriage slage slide beide beariarings anngs andd
the inner the inner mast bottom mast bottom slide bearings. slide bearings. Pry thePry the
inner mast from side to side (this must beinner mast from side to side (this must be
done from the rear of the mast) and measuredone from the rear of the mast) and measure
the movement. the movement. Calculate the Calculate the thickness of thickness of thethe
shims needed by subtracting 1/32 inch (.8shims needed by subtracting 1/32 inch (.8
mm) from the distance the inner mast moved.mm) from the distance the inner mast moved.
Raise the carriage to allow access to the innerRaise the carriage to allow access to the inner
mast bottmast bottom slide om slide bearings. bearings. The carriage The carriage andand
inner mast should then be secured in positioninner mast should then be secured in position
by supporting with an appropriate means.by supporting with an appropriate means.
(See(SeeNOTENOTE below)below)
DoDoNotNotattempt to eliminateattempt to eliminate
inner mast slide bearing slack in procedures 4.inner mast slide bearing slack in procedures 4.
and 5. by adding shims to the carriage slideand 5. by adding shims to the carriage slide
bearings. bearings. This can This can result in result in broken slide broken slide bear-bear-
ings.ings.
Back Rest Slide BlocksBack Rest Slide Blocks (Illustration 27-2)(Illustration 27-2).. TheThe
back rest slide block life depends on the dutyback rest slide block life depends on the duty
cycle and operation of cycle and operation of the truck. the truck. PeriodicallyPeriodically, the, the
back rest slide blocks may require shimming toback rest slide blocks may require shimming to
adjust for adjust for wear. wear. Perform the Perform the following proceduresfollowing procedures
to shim the back rest slide blocks:to shim the back rest slide blocks:
1.1. RaiRaise thse the care carriariage and nge and note tote the poshe positiition of ton of thehe
inner mast when the distance between it andinner mast when the distance between it and
the back rest slide block is the least amount.the back rest slide block is the least amount.
Shims should be added at this position.Shims should be added at this position.
2.2. Shim Shim the the back back rest rest slide slide blockblocks uns until ttil the slhe slideide
blocks just touch the inner mast.blocks just touch the inner mast.
NOTE:NOTE: Replace any bacReplace any back rest k rest slide blocks slide blocks thatthat
become cracked, damaged become cracked, damaged or worn to or worn to 3/4 inch3/4 inch
(19.1 mm) thickness.(19.1 mm) thickness.
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