Pacific Hoists U-MEGA Series Operations Manual & Parts List page 15

(a) Load chain:
Distorted, elongated or worn chain link will not sit properly on the load sprocket wheel
and may cause chain breakage and/or damage to hoist unit. To ensure safe and efficient
operation, the chain links must be checked for their pitch (inside length, inside width) and
outside width monthly according to following table.
CHAIN LINK
Chain Gauge – Wear and Stretch Measuring
(1) The chain gauge is useful and convenience for measuring.
(2) Please use a chain gauge to measure the chain pitch and diameter, such as illustrations
(1) and (2).
(3) Every chain ring must be measured, and the chain must be replaced when one of chain
ring is wear or stretch.
(4) It will be a cutting-out possibility if you use a chain fall either wear or stretch during
operation.
(5) Do not replace a chain fall by yourself and do please contact specific either service
centers or contractors to help you out.
(6) The chain fall must be replaced whole instead of a partial part.
(7) The load sheave, regulator, and chain compressing wheel must be replaced the same
time as you do a second time replacement.
Remark :
(1) Chain must be perfect condition without any defects and attachments.
PEH050S
PEH100S
PEH200S
OK NO
Illustration (1)
Chain pitch measure
Dia- Inside
Meter Length
Model
(mm) (mm)
(d) (p)
19.1
Ø6.3
20.2
Ø7.1
20.2
Ø7.1
OK
OK
Illustration (2)
Diameter measure
14
Inside Outside Breaking
Width Width Load
(mm) (mm) (kN)
(b1) (b2)
7.9 21.4 50
8.1 23.2 63.3
8.1 23.2 63.3
NO