Schaerer 7300 - Page 83

SECTION IV
MAINTENANCE / SERVICE
(4) Disconnect hose (3) from swivel fitting (4).
CAUTION
Make sure 0 - 5000 PSI (0 - 344.8 BAR)
gauge is installed and not 0 - 200 PSI
(0 - 13.8 BAR) gauge.
(5) Connect hose (A) of Test Gauge Assembly to
swivel fitting (2).
(6) Connect hose (B) of Test Gauge Assembly to
swivel fitting (4).
(7) Close shutoff valve of Test Gauge Assembly.
(8) Raise table to its upright position.
(9) If adjusting motor pump #1 pressure relief valve,
use hand control to run SEAT UP or SEAT
DOWN function while observing pressure gauge
reading.
Page 4-49Printed in U.S.A.
If adjusting motor pump #2 pressure relief valve,
use emergency override panel to run SEAT UP
or SEAT DOWN function, while observing
pressure gauge reading.
(10) Pressure gauge reading should be between 247
to 253 BAR (3581.5 to 3668.5 PSI). If pressure
relief valve setting needs adjusted, go to step
11. If pressure relief valve setting does not
need adjusted, go to step 15.
(11) Lay table onto its left side.
(12) Open shutoff valve of Test Gauge Assembly to
allow oil pressure to dissipate; then close
shutoff valve.
NOTE
Screwing adjusting screw inward raises pressure
setting of pressure relief valve. Unscrewing adjusting
screw lowers pressure setting of pressure relief valve.
Figure 4-52. Pressure Relief Valve Adjustment
1
2
3
4
6
A
B
PRESSURE GAUGE
0-344.8 BAR
0-5000 PSI
SHUTOFF
VALVE
HANDLE
CA818300
5
© Schaerer Mayfield USA, Inc. 2004