Komatsu PC58UU-3 User Manual

20-114
PC58UU-3
b
TESTING AND ADJUSTING LS DIFFERENTIAL PRESSURE
TESTING AND ADJUSTING
LS DIFFERENTIAL PRES-
SURE
Measuring
1. Measuring with differential pressure gauge
1) Remove pump pressure pickup plug (1) of
the control valve and LS pressure pickup
plug (2).
2) Install differential pressure gauge C5.
★
Connect pump discharge pressure side
(port PP) (1) to the high pressure side of
the differential pressure gauge and con-
nect the LS pressure side (port LS3) (2)
to the low pressure side.
3) Run the engine at full throttle and measure
the LS differential pressure under the fol-
lowing condition.
•
LS differential pressure during digging
operation of bucket with no load:
1.57 ± 0.1 MPa {16 ± 1 kg/cm²}
2. Measure with oil pressure gauge
★
Since the differential pressure does not
exceed 1.96 MPa {20 kg/cm²}, measure it
with the same pressure gauge.
1) Remove pump pressure pickup plug (1) of
the control valve and LS pressure pickup
plug (2).
2) Install oil pressure gauge C1.
★
Use and oil pressure gauge having the
minimum division of 0.98 MPa {10 kg/
cm²}.
3) Run the engine at full throttle and measure
the pump discharge pressure under the
condition in above.
★
Read the gauge pointer correctly from
its front side.
4) Run the engine at full throttle and measure
the pump discharge pressure under the
condition in above.
★
Read the gauge pointer correctly from
its front side.
5) Calculate the LS differential pressure from
the pump discharge pressure and LS pres-
sure.

Komatsu PC58UU-3 Specifications

General

Brand	Komatsu
Model	PC58UU-3
Category	Construction Equipment
Language	English