MAINTENANCE OF FORKLIFTS - OD1660 - LESSON 1/TASK 1
(g) The inlet connection block bore, where the o-rings seal
should be, are inspected for scratches and grooves.
(h) The brake drums should be checked for cracks, distortion,
and scored surfaces.
Scored brakedrums can be repaired by turning
them on a lathe.
No brake lining is any better than the drum it
The maximum amount a brakedrum should be turned is 0.060
to 0.080 inch.
(i) If any linings have come loose from the shoes, they should
(j) The frame assembly should be replaced if it is cracked or
broken. Expander tubes should be recemented if they are loose. All
shields should be removed to recement, reversing the block and shoe
assemblies from their original installation.
A good neoprene base
adhesive compound should be used to cement the shields.
(k) The expander tube should be replaced if cracked, charred,
or if the nozzle is loose.
(l) The brake linings should be replaced if worn beyond the
minimum thickness; if the torque bar forms ridges on the end face of
the linings that may cause the block and shoe assemblies to hang up,
or if excessive cracking or chipping is evident.
(m) The frame assemblies should
distorted from any crack or damage.
(n) The retracting springs are to be replaced if they are
broken or distorted and when new linings are installed.
springs are to be replaced to ensure uniform retraction.
(2) Straight Hydraulic Brake System Bleeding Procedure. To bleed
the straight hydraulic brake system, these procedures should be
(a) Fill the reservoir with hydraulic oil (OE-10).
The reservoir should be free of dirt.
should be provided in the reservoir to keep out