Komatsu 830E-AC Shop Manual page 483

2. After the tool has been installed, progressively
increase the torque on the cap screws in a cir-
cular pattern until the tapered piston breaks
loose, or until the maximum specified torque on
the cap screws of 2142 N·m (1580 ft lbs) is
reached.
3. If the specified torque is reached and the
tapered piston has not broken free, slightly
loosen the cap screws and apply heat to two
places, 180° apart, on the spindle. The satu-
rated temperature of the spindle must not
exceed 454° C (850° F).
Heating the spindle in excess of 454° C (850° F)
may cause serious damage to the spindle.
4. Tighten the cap screws again to the maximum
specified torque as described in step 2.
5. Using a large hammer and heat at the specified
locations, carefully tap on the top surface of the
spindle until the piston breaks free.
Note: In extreme cases, it may be necessary to
remove additional steering arm retaining cap screws
and use additional pusher cap screws to apply more
force.
6. With a fork lift supporting the hub and spindle
assembly as shown in Figure 3-4, move to
clean work area for repair.
G03029
FIGURE 3-4. SPINDLE ANE WHEEL HUB
Installation
1. Clean spindle bore and suspension rod taper so
they are free of all rust, dirt, etc. Clean and
check the tapped holes in bottom of Hydrair®
piston for damaged threads. Retap holes, if
necessary, with 1.250 in. - 12NF tap.
2. Lubricate spindle bore and suspension rod
taper with multi-purpose grease Number 2 with
3% Molybdenum Disulphide.
NOTE: Never use any lubricants on the spindle bore
containing copper, such as many "anti'-seize"
compounds.
contribute to corrosion in this area.
Front Wheel Hub and Spindle
REMOVAL
Products containing copper will
G3-5