Handler PT-6 FSS, Manual

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C) Remove retaining ring from flow control valve.
1) With punch and hammer, knock lever spool from valve body. CAUTION - Be
sure to mark in some manner top of spool before removing.
2) Clean thoroughly, area of housing from which lever spool was removed.
3) Clean thoroughly the lever spool outer area and blow out all holes with high
pressure air hose.
Reassemble as taken apart, making sure, spool is replaced with area you marked in the same
position.
If problem has not been eliminated, continue to investigation procedure D .
NOTE:
The following investigation should be carried out very carefully and exactly as
outlined for there is no relief system available for this procedure and if pump is working
properly excessive pressure will build up immediately and cause damage if instructions are not
carried out precisely.
D) Setting pressure for spinners.
1)
Run unit empty at ordinary operating speed (engine RPM’s) for approximately 10
minutes, to allow hydraulic oil to reach operating temperatures.
2)
Disengage PTO and install pressure gauge into “CF” port on flow control valve.
(Refer to hydraulic flow control valve drawing – page 3-7)
3) Set lever on flow control valve on 10.
4) Engage P.T.O. Rev truck engine up to approximately 2000 RPM.
5) Slowly release clutch while watching pressure gauge.
6) Pressure gauge should read 2000 PSI.
If not, adjust pressure in accordance to investigation procedure E .
E) Adjusting Hydraulic Flow Control Valve Pressure.
1) Remove cap nut on flow control valve (located on top of valve)
2)
Using a 5/16” Allen wrench turn adjustment screw “IN” to increase pressure or
“OUT” to decrease pressure.
3) Turn adjustable screw on half turn, and then check pressure setting as outlined
above.
i. Be sure to count number of turns you adjust screw.
4) Continue this procedure until pressure gauge reads 2000 PSI.
i. If a 2000 PSI reading is reached on the gauge replace relief valve cover nut.
ii. If screwing in on the relief adjusting screw had none or little effect on the
pressure, back adjusting screw out to its original position.
NOTE:
If unable to obtain 2000 PSI contact your local dealer or Chandler Equipment Service
Department at 1-800-243-3319