Service Manual Damcos LPU: Table of Contents
SM 8000-100-01 Ed 04 February 2017
4
Noise from pump, but only at high pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Noise from pump at both high and low pressure. . . . . . . . . . . . . . . . . . . . . . . . 55
Motor running hot, LPU is operating normally . . . . . . . . . . . . . . . . . . . . . . . . . . 56
LPU-D not maintaining pressure on actuator . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Spring actuator only partly closing or not starting to close . . . . . . . . . . . . . . . 58
Emergency operation by key giving oil spillage through breather valve . . . . 59
Emergency operation by key not possible, hydraulically locked. . . . . . . . . . . 59
Emergency operation by hand pump giving oil spillage through breather valve
59
Emergency operation by hand pump not possible . . . . . . . . . . . . . . . . . . . . . . 60
Pump not rendering sufficient oil at high pressure (“valve running too slowly”)
61
Pump not rendering sufficient oil at low pressure (“valve running too slowly”)
61
Motor running for a short time and stops
High pressure on the port to which oil is led. . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Motor running for a short time and stops . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Motor ”diving” in RPM in end position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Motor ”diving” in RPM as spring actuator opens . . . . . . . . . . . . . . . . . . . . . . . . 63
Oil spillage, generally . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Oil in electronic connection box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Oil spillage from breather valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Unit drawing too much current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Too little tank volume for operating actuator . . . . . . . . . . . . . . . . . . . . . . . . . . 66
LPU cannot raise pressure after hand pump operation
(but no problems after remote operation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
LPU leaking from bleeder valve when hand pump is mounted . . . . . . . . . . . . 68
Spring actuator do not close by emergency hand pump operation. . . . . . . . 69
LPU-Ex motor do not run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
LPU-Ex has to be bulkhead mounted because of too little space or zone 0 at ac-
tuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Position indicator errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Operating LPU-S 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Operating LPU-D 2a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Emergency Operation of LPU V.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Speed adjustment for Actuator on LPU (v.2) . . . . . . . . . . . . . . . . . . . . . . 83
Pump pressure adjustment for LPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
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