Kubota GZD15 User Manual

GZD15, WSM HYDRAULIC SYSTEM
4-S1
1. TROUBLESHOOTING
Symptom Probable Cause Solution
Reference
Page
Mower Does Not Rise A Control valve malfunctioning Repair or replace 4-S6, S7
A Lift cylinder damaged Replace 4-S8
A Relief valve spring damaged Replace 4-S6
A Relief valve setting pressure too low Adjust 4-S5
A Hydraulic pump defective Replace
A Oil strainer clogged Clean or replace G-23
A Suction pipe loosened or broken Repair or replace
A Suction pipe O-ring damaged Replace
A Insufficient transmission oil Refill G-17, 21
A Mower lifting linkage between mower lift pedal
and mower lift lever is not proper
Adjust linkage
Mower Does Not
Lower
A Control valve malfunctioning Repair or replace 4-S6, S7
Mower Drops by Its
Weight
A Lift cylinder worn or damaged Replace 4-S10
A Control valve malfunctioning Replace 4-S6, S7
Grass Collector Does
Not Rise
A Control valve malfunctioning Repair or replace 4-S6, S7
A Lift cylinder damaged Replace 4-S8
A Relief valve spring damaged Replace 4-S6
A Relief valve setting pressure too low Adjust 4-S5
A Hydraulic pump defective Replace
A Oil strainer clogged Clean or replace G-23
A Suction pipe loosened or broken Repair or replace
A Suction pipe O-ring damaged Replace
A Insufficient transmission oil Refill G-17, 21
Grass Collector Does
Not Lower
A Control valve malfunctioning Repair or replace 4-S6, S7
A Lift cylinder damaged Repair 4-S10
A Relief valve spring damaged Replace 4-S6
A Relief valve setting pressure too low Adjust 4-S5
A Hydraulic pump defective Replace
A Oil strainer clogged Clean or replace G-23
A Suction pipe loosened or broken Repair or replace
A Suction pipe O-ring damaged Replace
A Insufficient transmission oil Refill G-17, 21
Grass Collector Drops
By Its Weight
A Lift cylinder worn or damaged Replace 4-S10
A Control valve malfunctioning Replace 4-S6, S7
KiSC issued 04, 2006 A

Kubota GZD15 Specifications

General

Transmission	Hydrostatic
Drive Type	2WD
Engine Type	Diesel
Engine Power	15 HP
Weight	640 kg