Lift mast – 7000 Main lift chain system Order number 229735-040
Date 2005-11-04
Valid from serial number 904519-
T-code 781
in the figure and denotes the minimum permitted value of the disc height.
Maximal permitted outline wear is 5% of the height H2. If a lift chain reaches the maximum level of wear, the chain should be replaced. The nominal and minimum disc heights for respective lift chains are stated in the table in the chapter “Stretching”.
Stretching The amount of stretch on a lift chain is measured on the part of the chain that runs over the chain sprocket. The amount of stretch may, at the most, be 2% on the most worn section of the chain. Measurement is suitably made over 300-1000 mm of the chain. The nominal and maximum permitted chain lengths for lift chains are stated in the table below.
Type of chain
Nominal disc height H2 ( mm)
Minimum disc height H3 (mm)
Pitch P (mm)
Nominal chain length for 20/30/ 50 discs (mm)
Maximum permitted chain length for 20/ 30/50 discs (mm)
3/4”, 2x3
17.8
16.9
19.05
381/572/953
389/583/972
3/4”, 3x4
17.8
16.9
19.05
381/572/953
389/583/972
3/4”, 4x6
17.8
16.9
19.05
381/572/953
389/583/972
1”, 4x4
23,6
22,4
25,4
508/762/1270
518/777/1295
1”, 6x6
23,6
22,4
25,4
508/762/1270
518/777/1295
Wear to the bolts and around the holes on the discs are a reason why the chain stretches. The chain should be replaced if stretching is more than 2%.
© TIEE SARL
Service Manual
7SM08F
13- 7
