Gradall 544D (9136-4003) Service Manual - Manual (Page 319)

6.0 C
HAIN
I
NSPECTION AND
R
EPLACEMENT
!
DANGER
When inspecting chains, observe the following guidelines:
Remove the chain(s) from the machine.
Clean the chain(s) thoroughly with a suitable cleaning agent.
Check the chains for wear on link plate edges.
Maximum reduction of plate depth should not exceed 5% of total plate depth when new.
See dimension “C” below
C HAIN L INK D IMENSIONS
Dimensions of the chain links used on the Gradall 544C-10 and 544D:
See dimension “C” above
Chains should be scrapped if they have:
Cracked link plates
Damaged/worn bearing pins
Outer plates with elongated holes (which present the danger of the plate sliding
free of the rivet head with subsequent chain breakage).
Chains should also be examined for evidence of damage or corrosion.
Chains do not wear evenly along the full length. Maximum wear is generally confined to
those sections which articulate under load; i.e. where the chain passes over a pulley or a
shim.
It is impossible to determine the useful life of a worn chain by checking its overall length
against the normal overall length of a new chain. Worn chains must be examined over
their full length and then measured on that portion of the chain which exhibits most
serious signs of wear. This must be done when the chain is lying on a flat surface under
sufficient tension to take up all the slack.
The overall length of new chains used on the 544C-10 and 544D is:
An elongation of 2% represents the end of the useful life of a chain. In other words, when
P/N 9116-3037 is at or above a length of 14' 4 1/8" and P/N 9116-3036 is at or above a
length of 16' 9", they should be scrapped. Chains should also be scrapped if the links do
not meet tolerances indicated on the chain wear gauge (Gradall P/N 9116-4084).
In the interests of safety, all Gradall Material Handler owners
should check all chains at regular intervals, not exceeding 6 months
(1200 hours).
1.
2.
3.
Size New
3/4"
1"
Allowable Minimum
22/32"
61/64"
Chain Part No.
9116-3037
9116-3036
l
l
l
Chain Part No.
9116-3037
9116-3036
Pitch
3/4"
1"
Length
14' 3/4"
16' 4 7/8"
NOTE!
We recommend the use of a chain
wear gauge (Gradall P/N 9116-
4084) to perform this operation.
GRADALL GRADALL