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21
Troubleshooting and basic settings
Unit does not reach required pressure
1
piston
2
mounting nut
3
spring
4
washer
5
adjusting nut, working pressure
6
lock nut
7
adjusting nut, pressure switch
8
lock nut
9
rod
10
valve seat
11
ball
12
spring
Overflow valve leaking
– Unscrew lock nut and adjusting nut from the
pressure switch.
– Unscrew lock nut and adjusting nut from the
overflow valve.
– Remove washer and springs.
– Screw out the mounting nut and pull out the
rod.
– Remove the circlip and check all parts. Repla-
ce if necessary. Always replace the circlip.
– Unscrew the valve seat and remove ball with
spring. Check all parts. Replace if necessary.
– Lubricate all O-rings with silicone grease 6.288-
080 and assemble in the reverse order (spe-
cial tools).
– Adjustment, see page 22.
3
4
12
5
11
6
10
7
9
8
1
2
Summary of Contents for HD 1090
Page 1: ...HD 1090 Service Handbook 0 I 5 905 212 03 02...
Page 4: ...2 Unit function Equipment 10 15 12 9 10 13 11 14 16 1 8 2 3 4 5 6 7 0 I...
Page 6: ...4 Unit function Functional diagram 5 3 7 8 9 10 11 12 13 14 2 1 15 16 17 4 6...
Page 8: ...6 Unit function Pump 15 17 18 10 12 13 11 14 16 20 9 12 11 1 8 2 3 4 5 6 7 11 19 21...
Page 10: ...8 Unit function Pressure and flow control with the Servopress handgun 1 2 4 3...
Page 14: ...12 Unit function Handgun with pressure and flow control Servopress with low effort version...