SUB-SECTION 5G
VELOCITY FUSES
2. Install the spring and spring stop on the valve spool
3. Inspect the valve spool and bore for burrs and scoring. If
stem. Pack the spring with light weight rust proofing grease
scoring is not deep enough to cause objectionable leakage,
and lubricate the spool with clean hydraulic oil. Then in-
the surfaces can be stoned or polished with crocus cloth. If
stall the spool in the valve body and tighten the spring stop
scoring is excessive the valve body and spool must be re-
securely.
placed. Check the spool for freedom of movement in the
bore.
3. Check the operation of the valve by first prying the
REASSEMBLY. To reassemble the valve, proceed as fol-
spool stem out with a screwdriver under a jam nut, and
lows:
then releasing it, The spool should snap into the valve body
NOTE
when it is released. If the spool does not snap into the valve
body when it is released, binding exists, and the cause of
Coat all parts with clean hydraulic oil to facilitate
the binding must be eliminated before the valve is rein-
reassembly and provide initial lubrication. Petroleum
stalled on the cylinder.
jelly can be used to hold the O-rings in place during
reassembly.
4. When the valve is functioning properly, replace the
1. Install the O-rings and back-up rings on the spool as
weather cap and remaining jam nuts.
shown in Figure 5G-2.
Figure 5G-2. Velocity Fuse (1036Z403)
5G-5
