101
6.8 Inspection of lift circuit pressure relief valve operation
Check track tension at the inspection frequency indicated in the general chart. This valve acts as a
supplementary protection device for the electronic overload device and prevents the platform from
lifting once the nominal load has been exceeded by 50%.
To perform the test, unscrew the inlet plug “
M1
” or “
M2
” on the hydraulic valve
unit (
see drawing above
) and fit on a 1/4” Gas pressure gauge union as shown in
the figure alongside.
Now screw a tube for the pressure gauge fitting and a pressure gauge with 250 bar
full scale into the union described above.
While one operator remains on the ground so as to check the pressure relief valve
setting, another operator must work from the console in order to:
a)
start the platform and combustion engine
b)
press the platform "descent" button (
16
) until it reaches the limit and hold it down. This
activates the pressure relief valve of the lift circuit.
c)
Read the pressure on the gauge, which should be 190 bar ± 5 bar
The valve is calibrated during the testing operations performed by ALMAC S.r.l. and should not
require further adjustment unless:
•
the hydraulic circuit is replaced
•
the actual pressure relief valve is replaced
Pressure
gauge socket
- M2-
Lift circuit pressure
relief valve
Summary of Contents for BiBi 850 HE
Page 6: ...5 Chapter 1 General information...
Page 10: ...9 1 6 Performances H I A B L F E C G...
Page 19: ...18 Chapter 2 Safety information...
Page 24: ...23...
Page 25: ...24 2 3 2 Warning command danger identification and instruction signs...
Page 40: ...39 Chapter 3 Machine Description...
Page 41: ...40 3 1 Structure of the machine 2 4 5 6 7 9 10 11 13 14 19 27 28 15 18...
Page 42: ...41 View from A 20 22 21 23 24...
Page 43: ...42 12 8 25 16...
Page 44: ...43 17 2 26...
Page 45: ...44 3...
Page 56: ...55...
Page 59: ...58 Chapter 4 Instructions for use...
Page 68: ...67...
Page 69: ...68 For more information refer to Engine Use maintenance manual...
Page 71: ...70...
Page 72: ...71 For more information refer to Engine Use maintenance manual...
Page 91: ...90 Chapter 5 Emergency procedures...
Page 94: ...93 Chapter 6 Maintenance...
Page 105: ...104 Electrical panel casing Battery 1...
Page 116: ...115...
Page 117: ...116...
Page 118: ...117...
Page 119: ...118...
Page 120: ...119...
Page 123: ...122...
Page 124: ...123...
Page 125: ...124...
Page 133: ...132...
Page 136: ...135 HATZ ENGINE...
Page 137: ...136...
Page 138: ...137...
Page 139: ...138 Chapter 7 Demolition...
Page 141: ...140 APPENDICES...
Page 142: ...141 Appendix 1 Declaration of conformity...
Page 144: ...143 MANDATORY ROUTINE INSPECTIONS Date Observations Seal Signature...
Page 157: ...156 Appendix 4 Hydraulic diagram Appendix 5 Circuit diagram...