Gm Motor Maintenance And Inspection; Changing The Hydraulic Oil; Changing The Lube Oil; Gear Oil Changing Procedure - Kubota KX080-3 Workshop Manual

WSM KX080-3 Service
b. Maintenance and inspection
1. Daily inspection
Before running the GM motor, check the
following points daily.
CAUTION
Be sure to turn off the motor before checking
the following points, except checking for
unusual operating noise. Otherwise, you may
get injured or burnt. When checking for
unusual operating noise, keep yourself at a
safe distance. Do not touch nor come too close
to the running motor to avoid injury and burn.
1. Oil leak (hydraulic oil and gear oil)
2. Loose bolt
3. Unusual operating noise
4. Overheated casing
(Usual casing outer surface temperature
during continuous run: Max. 80°C)
CAUTION
Immediately after a run, the casing is still hot.
Measure the casing
temperature gauge. Do not touch it with your
hands to avoid burn.

2. Changing the hydraulic oil

*Change the hydraulic oil every 1000 operating
hours under normal operating conditions.
*If the hydraulic oil gets degraded earlier,
change it referring to the requirements below.
Test item
Viscosity change
10%
(40°C)
Type of additive is different from
Total oxidation
manufacturer
(mgKOH/g)
Contact them.
Water content
0.1%
(%)
mpurities
10mg/100m
Insoluble content
0.05%
(%)
temperature with a
Criteria
to manufacturer.
IV-S-138

3. Changing the lube oil

The reduction gears have been delivered filled
with lube oil (gear oil).
1. Types and recommended brands of gear oil
(1)Use SAE#90 or equivalent gear oil (API
classification, Class GL-4 or higher) with
extreme-pressure additive.
(2)The following brands are for your reference.
Company name
Idemitsu Kosan
Esso Oil
Showa Shell Oil
Cosmo Oil
Nippon Oil
Mobil Oil
2. Gear oil changing intervals
(1)First interval (first change after running-in):
After 50 operating hours.
(2)Intervals thereafter: Every 500 operating
hours Avoid mixing different types of lube oil.
Before pouring another type of lube oil, get
the reduction gears flushed.
3. Gear oil quantity: 1.3 liters

4. Gear oil changing procedure

CAUTION
Immediately after a run, the casing is still hot.
Do not touch it with your hands to avoid burn.
Do not remove any port plug while still hot,
either. Hot gear oil may gush out because of
the
pressure relief of the reduction gears, which
may get you scaled. Wait long enough until the
casing
cools down.
NOTE
If the gear oil runs short unexpectedly, pinpoint
and remove the cause. Then replenish gear oil.
NOTE
When letting out the gear oil, be sure to receive
it in a pan, not on the ground. Handle waste oil
according to your local waste disposal rules
and regulations.
Hydraulic system
Product name
Apolloil HE 90 S
Esso Gear Oil GP 90
Spirax EP 90
Cosmo Gear GL-4 90
Nisseki Hypoid Gear 90
Mobilube HD 90
(in random order)