Iseki SGR19 User Manual

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SERVICE MANUAL FOR SGR19 & SGR17
5. MAJOR TROUBLES AND CAUSES, AND COUNTERMEASURES
When the system should suffer troubles, confront them in accordance with the countermeasures men-
tioned below. In such cases, analyse the trouble properly and check the whole hydraulic system besides
the orbit-roll and control valves.
Troubles Presumable causes Countermeasures
Steering wheel is hard 1. Hydraulic system
to turn. a. Too high back pressure Correct pressure.
b. Too low set pressure of steering Correct pressure.
relief valve
c. Insufficient output Check pump.
2. Orbit-roll
a. Off-set of steering column axis Correct. (If steering wheel become
easy to turn when the set bolts of
the orbit roll are loosened, off-set of
the axis is presumable.)
b. Seized orbit roll due to dust trapped Replace.
between spool and sleeve or sleeve
and housing.
c. Excessive tightening torque of end Retighten bolts evenly to
cap bolts specified torque.
d. Mis-installed ball of check valve Install ball.
for emergent steering
3. Directly connected valve and
other control valves
a. Too high tightening torque of port Correct.
connectors
b. Too high tightening torque of Correct.
set bolts
c. Dust trapped in relief valve Disassemble, wash, and reset
set-pressure or replace valve
assembly with a new one.
d. Dust rapped between housing Replace valve assembly with
a new one.
and spool
e. Mal)functioning Replace valve assembly with
a new one.
f. Clogged orifices Disassemble, wash, and
reassemble valve.
g. Improper control spring Replace with a proper spring.
4. Pump
a. Not operating Operate pump.
b. Worn out or out of order Replace with a new one.

Iseki SGR19 Specifications

General

Brand	Iseki
Model	SGR19
Category	Lawn Mower
Language	English