Inspection And Maintenance - Jet JEH Series Operation Manual

INSPECTION AND MAINTENANCE

All repairs and adjustments are to be performed by trained and experienced personnel using
procedures that are approved for the hoist system being serviced. All safety-related deficiencies discovered in
the inspection are to be corrected before hoist is placed back into service. Check for internal damage whenever
external damage has occurred.
Read and follow the ANSI Inspection and Maintenance instructions. Know the meaning of Frequent Inspection,
Periodic Inspection, Normal Service, Heavy Service, and Severe Service. It is the customer's responsibility to
understand and follow all ANSI and This inspection and maintenance instructions.
The following items are to be inspected by appointed personnel at the time interval noted below. Dated inspection and
repair reports must be maintained. Copies of all reports must be available to service personnel.
Inspection Schedule A
Service Interval:
Normal Service — Monthly
Heavy Service — Weekly to Monthly
Severe Service — Daily to Weekly
1. Check brake for slippage.
2. Check that pushbutton controls operate properly.
3. Check that limit switches function properly.
Without load, operate up button control while
observing stopper spring. If stopper spring
becomes compressed and motor does not stop,
STOP operation immediately. The limit switch is
not operating properly. Repeat test with down
button control.
4. Check top hook and load hook for deformation,
chemical damage, and cracks.
5. Check that the load chain is clean and lightly
lubricated, free of excessive wear or deformation
at the contact points between links and link and
hook. This hoist uses a special alloy hoisting
chain and does not interchange with any other
manufacturer. All replacement chain must be
purchased from JET.
6. Check that the chain is untwisted and passes
through all sprockets smoothly while under load.
7. Check the entire hoist system for signs of damage
and loss of integrity
Inspection Schedule B
Service Interval:
Normal Service — Yearly
Heavy Service — Semi-Annually
Severe Service — Quarterly
1. Do all the Schedule A items.
2. Check the entire unit for loose screws, bolts,
nuts and pins.
3. Check for evidence of excessive wear,
corrosion, cracks, or distortion in the following
parts: hook parts, chain attachments,
suspension bolts and shafts, gears, bearings,
pins, rollers, and locking and clamping devices.
4. Check for evidence of damage to hook parts
including hook retaining nuts and collars and
pins and hook holding frame and parts used to
secure the frame.
5. Check for evidence of damage or excessive
wear of load gear, sheave, and sprocket wheel.
If the pockets are too deep, the chain may jam
with a corresponding failure of engagement
between chain and sprocket or sheave.
6. Check for evidence of excessive load brake
wear. Inspect clearance between brake
components and adjust if needed.
7. Check for evidence of pitting or other
deterioration of visible controller contacts.
8. Check for evidence of deterioration of
supporting structures and trolleys.
9. Check for visible deformation of
limit switch coil springs.
10. Check that all warning labels are
present and readable.
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