Group 34, Uprights
34-3-2 • Upright Inspection SM 765, Nov ’06
Basic Visual Inspection
Use the following steps to conduct an initial visual inspec-
tion of the upright. This is the same type of inspection
operators should be conducting on a daily basis.
If you note problems with any component during the basic
visual inspection, continue with “Extended Inspection”
for checks and service.
WARNING
!
The procedures for checking, maintaining,
and adjusting uprights, carriages, and forks
involve movement of the components. Failure
to follow these warnings can result in serious
injury. Always use extreme caution.
Do not walk or stand under raised forks.
Keep clear of load and carriage when making
any check or adjustment.
Keep your arms and fingers away from mov-
ing parts of the upright.
Do not reach through open areas of the
upright.
General
• Check to make sure all fasteners are secure.
• Check to make sure the upright lifts and lowers
smoothly with and without a capacity load.
• Check for visible damage to components.
Forks
• Check function and security of the fork latch.
• Inspect the forks for cracks, especially the hanger
and heel areas.
• Check for wear in the fork heel. If heel wear is evi-
dent, perform the extended inspection.
• Inspect the fork hanger and carriage fork bar for
excessive wear.
• Inspect for bent forks.
Load Backrest
• Inspect load backrest for damage such as cracks or
bending.
• Check for tight mounting fasteners.
Lift Chains
Inspect the chains for:
• Proper lubrication. The links should have a coat of
oil on all surfaces. Lubrication oil should penetrate
completely into chain joints.
• Good condition of the chain links and pins. No
rust, corrosion, stiffness, or cracking should be evi-
dent. Pins should not be turned or protruding.
• Excessive side wear or edge wear on the chain
plates.
• Correct, equal tension on chain sets.
• Secure anchor bolt, adjustment nut, and jam nut
mounting.
• Correct alignment of the chain anchors to the chain
and chain sheaves. Adjust turned chain anchors.
• Loose, broken, or damaged anchor bolt pins and
cotter pins. Replace defective pins and cotter pins.
Rollers
Inspect the upright and carriage rollers for:
• Broken or loose rollers.
• Loose, broken, or misadjusted thrust roller on the
carriage.
• Obvious signs of failed bearing seals.
N
TE
Some grease will purge from the bearings in
the first 100-200 hours of operation.
• Excessive looseness in carriage or upright roller
shimming.
Upright and Carriage Weldments
Inspect the upright and carriage for:
• Debris or foreign objects on the components.
• Bent, cracked, or broken components.
• Undesirable wear on or contact between compo-
nents.
• Irregular roller patterns and signs of excessive
wear or scraping on the rails.
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