43
TwinForce™ Series Waterblast Unit
Filter Cartridge Replacement
1. Relieve pressure from the housing using
the bleed valve then loosen the three eye-
nuts (Figure 55
) on the filter cover.
2. Slowly open the cover and capture the
spring (Figure 56) and spring keeper.
3.
Remove the filter cartridge.
4.
Install the new filter cartridge onto the
guide rod. Ensure the guide rod is correct-
ly seated into the bottom of the housing.
5. Inspect the O-ring and install a new one if
necessary.
6. Place the spring keeper and spring into
place on the end of the filter cartridge.
7.
Move the filter cover into position and
tighten the eye-nuts.
8. Prepare the pump for operation and start
the unit. Start a typical blast operation
and record the following:
• Engine rpm
•
Gauge pressure on the secondary filter
9. Save this record for monitoring the status
of the secondary filter. Monitor the pres
-
sure gauge as more hours of operation
are accumulated on the filter cartridge.
When the pressure on the filter gauge has
dropped approximately 7 to 10 psi (0.48 to
0.69 bar) (with the unit operating at the
same rpm as earlier recorded), the filter
must be replaced.
Switch Adjustment
The differential pressure switch will shut
down the unit when the pressure drop across
the filter is approximately 7 to 10 psi (0.48 to
0.69 bar). If the switch doesn’t close within the
7 to 10 psi (0.48 to 0.69 bar) range, it may need
to be adjusted. Contact Jetstream for switch
adjustment instructions.
Uni-Valve Life
The uni-valve seats can be damaged by dirty
water. It is important to change filters regular
-
ly to improve pump performance and prolong
valve life. (Nozzles and bypass cartridges are
also adversely affected by dirty water).
Figure 55: Filter Cover.
Eye Nut
Bleed Valve
Eye Nuts
Cover
Figure 56: Cartridge Removal.
Spring
Keeper
Filter
O-Ring
Inspect uni-valve seats regularly to monitor
condition and lap the valve seats when neces-
sary. Refer to
for
lapping instructions.
Summary of Contents for TwinForce Series
Page 1: ...OPERATION MANUAL TwinForce Series Waterblast Unit...
Page 2: ...Visual Safety System...
Page 11: ...3 TwinForce Series Waterblast Unit...
Page 22: ...14 Operation Manual...
Page 42: ...34 Operation Manual...
Page 48: ...40 Operation Manual...
Page 52: ...44 Operation Manual...
Page 100: ...92 Operation Manual...
Page 104: ...96 Operation Manual...
Page 106: ...A 2 Appendix A Technical Specifications...
Page 107: ...B 1 TwinForce Series Waterblast Unit APPENDIX B LONG TERM STORAGE PROCEDURE...