3-36
G - EVERY 4000 HOURS OF SERVICE
Carry out the operations described previously as well as the following operations.
G1 - JIB INNER CHAIN WEAR
CHECK
MT 1840 E3
THE CHECKING OF THE JIB INNER CHAINS REQUIRES THE TELESCOPES TO BE DISASSEMBLED (CONTACT YOUR DEALER).
Chain wear occurs at a number of locations.
On the articulations, which leads to elongation of the chain.
On the edge of link plates through contact with the pulleys.
On the face of the plates and the extended pins through contact with the pulley flanges.
On the alignment of the flats of the extended pins.
CHAIN ELONGATION
We recommend that you perform this operation using the chain checking gauge (fig. G1)
(MANITOU part No.: 161583).
- As the chain will likely wear unevenly over its length, divide the chain into 4 equal sections
and check with the gauge at the centre of each section.
If the maximum dimension is exceeded (228.6 mm +2% = 233.2 mm), replace the pair of chains (contact your dealer).
SIDE WEAR OF PLATES
As for chain elongation, perform a check in the middle of each section using a calliper gauge.
If the dimension is less than the minimum dimension (15.5 mm -2% = 15.2 mm), replace the chain or the pair of chains (contact your dealer).
EXTENDED PIN WEAR
As for chain elongation, perform a check in the middle of each section using a calliper gauge.
If the dimension is less than the minimum dimension (42.25 mm -2% = 41.4 mm), replace the chain or the pair of chains (contact your dealer).
- In addition to wear, the high pressures between the side of the plates and the pulleys may force out material, causing the
articulations to seize. Replace the pair of chains in this case also.
ALIGNMENT OF EXTENDED PIN FLATS
Check the chains over their entire length.
- High friction between the plates and the extended pins may cause the pins to turn in the outer plates and thus come out of their
housing.
If the flats are not aligned in the longitudinal direction of the chain, replace the chain or the pair of chains (contact your dealer).
19,05 mm
19,05 mm x 12 = 228,6 mm
G1
42,25 mm
15,5 mm
OKNON OK
To Next Page
Loading...
Need help?
General