OPERATOR’S MANUAL
PRE-OPERATION CHECK
FOREWORD
REQUESTING SERVICING
SAFE OPERATION
3
SPECIFICATIONS
Models
RK80-1T
RK70-T
RK95-1T
Type
Number of cylinder
Bore
×
Stroke (mm)
Displacement (cm
3
)
Continuous
rated output
Max. output
Cooling system
Combustion system
Fuel
Lubricating oil
Lubricating system
Starting system
Direction of revolution
Cooling water capacity (L)
Fuel tank capacity (L)
Crankcase oil capacity (L)
Lamps
Dynamo (V-W)
Dry weight (kg)
Direct injection system
1.6
10
2.4
Horizontal, water-cooled 4 cycle diesel engine
1
Radiator
Light diesel oil (SAE No.2-D)
API Service CC, CD or CF class
(SAE#30, 20, 10W-30)
Forced lubrication with trochoid pump
Manual speed-doubling handle
Counter-clockwise (facing flywheel)
12V32W
[12V-45W]
kW/s
-1
(rps)
HP/min
-1
(rpm)
kW/s
-1
(rps)
HP/min
-1
(rpm)
82
×
84
443
5.2 / 36.7
7 / 2200
6 / 40
8 / 2400
83
80
×
75
376
4.5 / 36.7
6 / 2200
5.2 / 40
7 / 2400
Three vortex
combustion system
1.3
8
2.0
67
86
86
×
84
487
6 / 36.7
8 / 2200
7.1 / 40
9.5 / 2400
NOTE :
• Specifications are subject to change without notice.
REVERSED ENGINE
REVOLUTION AND REMEDIES
RK 70-T, RK 80-1T,
RK 95-1T
SERIES
PRINTED IN JAPAN
© KUBOTA Corporation 2008
Code No. 1T281-8911-2
AQ . F . 3 - 8 . 10 . AK
KUBOTA Corporation wishes to express its deep appreciation to you
for your purchase of the KUBOTA Diesel Engine which has been de-
signed and manufactured through many years of research and devel-
opment.
We also wish to express our deep appreciation for your patronage of
KUBOTA products.
We are confident that the machine will give you the results you de-
sire, but in order to get
“Higher efficiency” “Greater economy” “Longer service”
To obtain the best use of your engine, please read this manual care-
fully.
It will help you become familiar with the operation of the engine and
contains many helpful hints about engine maintenance.
W h e n y o u w a n t t o h a v e
servicing from the dealer from
whom you purchased your
KUBOTA diesel engine, please
inform them of the model
number and serial number of
your KUBOTA diesel engine.
1. Before operation, wear a proper cap and work clothes to prevent clothing,
hair, towels and such from getting caught in the engine.
2. Before operation, check all set bolts and nuts for looseness and tighten if
necessary.
3. Avoid placing inflammable materials close to the engine during operation.
4. As exhaust gases are harmful:
(1) Avoid operating the engine in an ill-ventilated place or where exhaust
gases accumulate easily.
(2) Take special care during operation to prevent exhaust gases from af-
fecting yourself, or people or animals around you.
5. When using an belt, install a cover, fence or similar device to prevent the
risk of injury. Be sure to stop the engine before installing or removing the
belt.
6. If the engine is to be lent to somebody, explain the handling procedures
and point out that the Operator’s Manual must be read carefully before
use.
7.
Keep children away from the engine during operation.
8. Do not touch the muffler, exhaust pipe or other hot parts during or imme-
diately after operation.
9. Always stop the engine in the following cases:
(1) When checking, adjusting or cleaning each part.
(2) When discharging, pouring or injecting oil from or into each part.
(3) When cleaning off dust or other foreign matter accumulated on the
muffler.
CAUTION
To avoid personal injury:
1
Reversed engine operation can make
the machine reverse and run it back-
wards. It may lead to serious trouble.
1
Reversed engine operation may make
exhaust gas gush out into the intake
side and ignite the air cleaner; It could
catch fire.
Reversed engine revolution must be stopped
immediately since engine oil circulation is cut
quickly, leading to serious trouble.
How to tell when the engine starts running back-
wards
1. Lubricating oil pressure drops sharply. Oil
pressure warning light, if used, will light.
2. Since the intake and exhaust sides are reversed,
the sound of the engine changes, and exhaust
gas will come out of the air cleaner.
3. A louder knocking sound will be heard when
the engine starts running backwards.
Remedies
1. Immediately set the engine stop lever to the
“STOP” position to stop the engine.
2. After stopping the engine, check the air cleaner,
intake rubber tube and other parts and replace
parts as needed.
3
COOLANT WATER
FUELING
OILING
AIR BLEEDING
Fill the radiator with tap water or clear
rain water and retighten the pressure
cap. If any mud or dust is admitted into
the radiator, it will impede radiator
performance, eventually leading to
overheating of the engine. Although the
radiator will perform for more than a
week once it is filled, be sure to check
and see if the water level is proper before
starting the engine each time.
Fill the fuel tank with SAE No.2-D Diesel
Fuel Oil.
CAUTION :
1
Always stop the engine be-
fore refueling. Keep away
from sparks and flames.
3
(1) Level the engine and check the oil
level on the oil gauge. If it is lower
than the line marked on the oil level
gauge (the prescribed level), add
more oil until the oil level reaches
the upper marked line. If the oil in
the engine is badly contaminated,
drain all the oil and refill.
(2) Remove the air cleaner and check the
o i l l e v e l a n d s e e i f t h e o i l i s
contaminated. If the air cleaner is
stained heavily, wash it with fuel and
add oil until it reaches the specified
level.
When the engine is started for the first
time or right after being refueled, be sure
to bleed air from the fuel system in the
following manner.
(1) Throw the fuel cock lever from the
“C” (closed) position to the “O”
(open) position and wait 20 seconds
before starting the engine.
(2) Operate the engine with the fuel cock
lever in the “O” (open) position.
