Service Manual
| Simpro Multi-Tip | v40.0 | June 2018 | Page 22
8.2
Mast Blocks
The Cradle Carrier has four moulded plastic blocks that run in the mast. If they are worn down, the
carrier will rub against the mast, causing sticking, a grinding noise, and wear of the mast and/or
carrier.
Removal and Refitting
I.
Remove the cradle carrier as described in section 5.1.
II.
Lever the blocks out of the carrier frame, and tap the pins out of the blocks.
III.
Tap the pins into the new blocks, with 5mm protruding top and bottom.
IV.
Before fitting the new blocks to the carrier, check that they slide freely all the way up the
mast. If they are tight at any point, they may have to be filed or machined to fit.
V.
One end of the blocks is slightly extended; this is normally the ‘wear face’, and goes
towards the back at the bottom, and the front at the top.
VI.
Tap the blocks into place, ensuring correct orientation, then slide the carrier up and down
in the mast to check that it does not stick or jam. If the carrier or the mast is slightly
twisted, one or more blocks can be turned end-for-end to minimize the impact of this.
VII.
When satisfied, reassemble in the reverse order.
8.3
Gas Strut
The gas strut is threaded into a plate on the inside of the mast sliding assembly. To remove, lower
the cradle fully, and lock the machine out. Reach inside the mast and twist the gas strut anti-
clockwise about 5 complete turns, and it will come free. Re-fitting is a reversal of this process.
8.4
Lifting Chain
Multi-Tip tippers have a single lifting chain, which is attached to the ram mount bracket by means
of an adjust
ing bolt, and to the “cradle
-
carrier” which run inside the mast. The chain is ½” British
Standard simplex, nickel-plated. The chain goes around a roller on the top of the ram, then down
inside the mast to a bracket on the cradle-carrier.
Spray the chain occasionally with good-quality penetrating / lubricating oil. Unscrew the ram-cover
and spray as much of the chain as possible, taking care not to allow fingers or clothing to become
trapped.
Removal and Refitting
I.
Remove the cradle and unbolt the main shaft from the cradle-carrier.
II.
Unscrew and remove the upper and lower ram covers. Release the clip on the connecting
link attaching the chain to the adjusting bolt.
III.
Lie the machine over on its front so the mast is horizontal, and slide the cradle carrier out
the bottom of the mast.
IV.
Disconnect the chain from the bracket at the bottom of the cradle carrier. Re-connect the
new chain, and tap the bracket with a hammer to ensure that the chain is retained tightly.
V.
Reassembly is a reversal of this process.
