Rok 150-51-50255 User manual

LOG SPLITTER
4 TON LOG SPLITTER –Owner’s Manual
FOR YOUR SAFETY
READ AND UNDERSTAND THE ENTIRE MANUAL
BEFORE OPERATING MACHINE
MODEL NUMBER : 150-51-50255
Save This Manual for Future Reference

2
SAFETY WARNINGS & CAUTIONS
SAFETY WARNINGS & INSTRUCTIONS
SYMBOL AFFIXED TO THE
MACHINE
UNDERSTAND YOUR LOG SPLITTER
Read and understand the owner’s manual and labels affixed to
the log splitter. Learn its application and limitations as well as the
specific potential hazards.
DRUGS, ALCOHOL AND MEDICATION
Do not operate the log splitter while under the influence of drugs,
alcohol, or any medication that could affect your ability to use it
properly.
AVOID DANGEROUS CONDITIONS
Put the log splitter on a 60 - 75cm high, stable, flat, and level
work bench where there is plenty of room for handling, and help
the operator stay altert. Bolt the log splitter to the work surface if
it tends to slip, walk, or slide.
Keep your work area clean and well lighted. Cluttered areas
invites injuries.
Do not use the log splitter in wet or damp areas or expose it to
rain.
Do not use it in areas where fumes from paint, solvents or
flammable liquids pose a potential hazard.
INSPECT YOUR LOG SPLITTER
Check your log splitter before turning it on. Keep guards in place
and in working order. Form a habit of checking to see that keys
and adjusting wrenches are removed from tool area before
turning it on. Replace damaged, missing or failed parts before
using it.
DRESS PROPERLY
Do not wear loose clothing, gloves, neckties or jewelry (rings,
wrist watches). They can be caught in moving parts.
Protective electrically non conductive gloves and non-skid
footwear are recommended when working. Wear protective hair
covering to contain long hair, preventing it from get caught in
machinery.
PROTECT YOUR EYES AND FACE
Any log splitter may throw foreign objects into the eyes. This can
cause permanent eye damage. Always wear safety goggles.
Everyday eyeglasses have only impact resistant lenses. They
are not safety glasses.
Do not put the log splitter on the ground for operations. This is
awkward operating position that the operator has to bring his
face close to the machine, and thus risks being struck by wood
chips or debris.

3
EXTENSION CORDS
Improper use of extension cords may cause inefficient operation
of the log splitter which can result in overheating. Be sure the
extension cord is no longer than 10m and its section is no less
than 2.5mm2to allow sufficient current flow to the motor.
Avoid use of free and inadequately insulated connections.
Connections must be made with protected material suitable for
outdoor use.
AVOID ELECTRICAL SHOCK
Check that the electric circuit is adequately protected and that it
corresponds with the power, voltage and frequency of the motor.
Check that there is a ground connection, and a regulation
differential switch upstream.
It is recommended for you to use a Residual Current Device with
a Rated Residual Current of 30mAor less.
WARNING: It is recommended that a safety pack is used with
portable tools.
Ground the log splitter. Prevent body contact with grounded
surfaces: pipes, radiators, ranges, and refrigerator enclosures.
Never open the pushbutton box on the motor. Should this be
necessary, contact a qualified electrician.
Mark sure your fingers do not touch the plug’s metal prongs
when plugging or unplugging the log splitter.
KEEP VISITORS AND CHILDREN AWAY
The log splitter must be always operated by one person only.
Other people should keep a safe distance from the work area,
especially when the log splitter is under operations. Never use
another people to help you with freeing jammed log.
INSPECT YOUR LOG
Make sure there are no nails or foreign objects in logs to be split.
The ends of the logs must be cut square. Branches must be cut
of flush with the trunk.
DON’T OVERREACH
Floor must not be slippery.
Keep proper footing and balance at all times.
Never stand on log splitter. Serious injury could occur if the tool is
tipped or if the cutting tools is unintentionally contacted. Do not
store anything above or near the log splitter where anyone might
stand on the tool to reach them.
AVOID INJURY FROM UNEXPECTED ACCIDENT
Always pay full attention to the movement of the log pusher.
Do not attempt to load the log on until the log pusher has
stopped.
Keep hands out of the way of all moving parts.

4
PROTECT YOUR HANDS
Keep your hands away from splits and cracks which open in the
log; They may close suddenly and crush or amputate your
hands.
Do not remove jammed logs with you hands.
DON’T FORCE TOOL
It will do a better and safer job at its design rate. Never try to split
logs larger than those indicated in the specifications table. This
could be dangerous and may damage the machine.
Don’t use log splitter for a purpose for which it was not intended.
NEVER LEAVE TOOL RUNNING UNATTENDED
Don’t leave tool until it has come to a complete stop.
DISCONNECT POWER
Unplug when not in use, before making adjustments, changing
parts, cleaning, or working on the log splitter; Consult technical
manual before servicing.
PROTECT THE ENVIRONMENT
Take used oil to an authorized collection point or follow the
stipulations in the country where the log splitter is used.
Do not discharge into drains, soil or water.
MAINTAIN YOUR LOG SPLITTER WITH CARE
Keep the log splitter clean for best and safest performance.
MAKE THE WORKSHOP CHILDPROOF
Lock the shop. Disconnect master switches. Store the log splitter
away from children and others not qualified to use it.

5
APPLICATION CONDITIONS
This log splitter is a home use model. It is designed for operating under ambient
temperatures between +5oC and 40oC and for installation at altitudes no more than 1000m
above M.S.L. The surrounding humidity should less than 50% at 40oC. It can be stored or
transported under ambient temperatures between -25oC and 55oC.
SPECIFICATIONS
Model Number
150-51-50255
Motor
230V~ 50Hz 1500W S3 IP54
Log Capacity
Diameter
5 ~ 25cm
Length
37cm
52cm
Splitting Force
4 t
Hydraulic Pressure
16Mpa
Hydraulic Oil Capacity
2.4 L
4.2L
Overall Size
Length
780mm
940mm
Width
260mm
Height
480mm
Weight
38 kg
41kg
The diameter of the log is indicative –a small log can be difficult to split when it has
knobs or a particularly tough fiber. On the other hand, it may not be difficult to split logs
with regular fibers even if its diameter exceeds the max. figure indicated above.
ELECTRICAL REQUIREMENTS
Connect the main leads to a standard 230V+10% (50Hz+1Hz) electrical supply which has
protection devices of under-voltage, over-voltage, over-current as well as a residual current
device (RCD) which maximum residual current rated at 0.03A.

6
SET UP AND PREPARATION FOR OPERATION
1. Bolt the Support Leg to the Log Splitter, lift the log splitter by the handles at both ends
and place it on a 60 –75cm high, stable, flat and level work surface.
2. Familiarize yourself with the controls and features of this log splitter in the illustrations.
1. Log Pusher
2. Work Table
3. Wedge
4. Lift Handle
5. Support Leg
6. Log Retaining Plates
7. Switch
8. Motor
9. Pushbutton Box
10.Wheels for Minor Moving
ONLY.
11.Hydraulic Control Lever
12.Control Lever Guard
13.Bleed Screw
14.Oil Drain Bolt w/ Dipstick
Before operating the log splitter, the Bleed Screw should be loosened by some
rotations until air can go in and out of the oil tank smoothly.
Air flow thru the Bleed Screw hole should be detectable during the log splitter is
under operations.
Before moving the log splitter, make sure the Bleed Screw is tightened to avoid oil
leaking from this point.
FAILED TO LOOSEN THE BLEED SCREW WILL KEEP THE SEALED AIR IN HYDRAULIC
SYSTEM BEING COMPRESSED AFTER BEING DECOMPRESSED. SUCH CONTINUOUS
AIR COMPRESSION AND DECOMPRESSION WILL BLOW OUT THE SEALS OF THE
HYDRAULIC SYSTEM AND CAUSE PERMANT DAMAGE TO THE LOG SPLITTER.

7
15. Max Pressure Limiting Screw
DO NOT ADJUST THE MAX PRESSURE
LIMITING SCREW !
Max pressure was set before the log
splitter ex work and the max pressure
limiting screw is sealed with glue to
ensure the log splitter works under
pressure no more than 4 tons. The
setting was done by qualified
mechanic with professional
instruments.
Unauthorized resetting will cause the
hydraulic pump fail to output enough
splitting pressure or RESULT IN
SERIOUS INJURY AS WELL AS DAMAGE TO
THE MACHINE .
15
WIRING DIAGRAM
PLUMBING DIAGRAM

8
LOG SPLITTER OPERATION
This log splitter is equipped with “ZHB” control system that requires to be operated by both
hands of the user –Left hand controls the hydraulic control lever while right hand controls
the pushbutton switch. The log splitter will freeze upon absence of either hand. Only after
both hands release the controls, the log pusher starts to return backward to the starting
position.
Trigger type lock-out device is adopted to avoid accidental Hydraulic Control Lever
pushdown. To operate the Hydraulic Control Lever, draw the Trigger backward with the
index finger before push the Hydraulic Control Lever forward.
Never force the log splitter for more than 5 seconds by keeping pressure
on it to split excessively hard wood.
After this time interval, the oil under pressure will be overheated and the machine could be
damaged. For such extremely hard log, rotate it by 90oto see whether it can be split in a
different direction. In any case, if you are not able to split the log, this means that its
hardness exceeds the capacity of the machine and thus that log should be discarded to
protect the log splitter.
Always set logs firmly on the log
retaining plates and work table. Make
sure logs will not twist, rock or slip while
being split. Do not force the blade by
splitting the log on the upper part. This
will break the blade or damage the
machine.

9
Break log in the direction of its growing grain. Do not place log across the log splitter for
splitting. It may be dangerous and may seriously damage the machine.
Do not attempt to split 2 pieces of logs at the same time. One of them may fly up and hit
you.
FREEING A JAMMED LOG
Release both controls.
After the log pusher moves back and
completely stops at its starting position,
insert a wedge wood under the jammed
log.
Start the log splitter to push the wedge
wood to go completely under the jammed
one.
Repeat above procedure with sharper
slope wedge woods until the log is
completely freed.
Do not try to knock the jammed log off.
Knocking about will damage the machine
or may launch the log and cause
accident.

10
REPLACING HYDRAULIC OIL
Replace the Hydraulic oil in the log splitter after
every 150 hours of use. Take following steps to
replace it.
Make sure all moving parts stops and the log
splitter is unplugged.
Unscrew Oil Drain Bolt with Dipstick to remove
it.
Turn the log splitter on the Support Leg side
over an 4 liters capacity container to drain the
hydraulic oil off.
Turn the log splitter on the the motor side.
Refill fresh hydraulic oil at the volume as per the
hydraulic oil capacity of a particular model
indicated in above specifications table.
Clean the surface of Dipstick on the Oil Drain
Bolt and put it back into the oil tank while keep
the log splitter vertically.
Make sure the level of the refilled oil is just
between 2 grooves around the Dipstick.
Clean the Oil Drain Bolt before thread them
back. Make sure they are tightened to avoid
leakage before place the log splitter horizontally.
Periodically check oil level to ensure it is
between 2 grooves around the Dipstick. Upon
Lower oil level, oil refilling is required.
Following hydraulic oils or equivalent are recommend for the log splitter’s hydraulic
transmission system:
SHELL Tellus 22
MOBIL DTE 11
ARAL Vitam GF 22
BP Energol HLP-HM 22

11
SHARPENING WEDGE
After using the log splitters for some time, sharpen the wedge of the log splitter using a
fine-toothed file and smooth any burrs or crushed area along the cutting edge.
TROUBLE SHOOTING
PROBLEM
PROBABLE CAUSE
REMEDY SUGGESTED
Motor Stops to
Start
Overload Protection Device
disengaged to protect the log splitter
from being damaged
Contact a qualified Electrician for opening
the Pushbutton Box to engage the Overload
Protection Device inside *
Fails to split logs
Log is improperly positioned
Refer to “ Log Splitter Operation” section for
perfect log loading.
The sizes or hardness of the log
exceeds the capacity of the machine
Reduce the log sizes before splitting it on the
log splitter
Wedge cutting edge is blunt
Refer to “ Sharpening Wedge “ section to
sharpen the cutting edge.
Oil leaks
Locate leak(s) and contact the dealer
Unauthorized adjustment was
made on Max. Pressure Limiting
Screw. Lower max pressure rating
was set.
Contact the dealer.
The log pusher
moves jerkily,
taking unfamiliar
noise or vibrating a
lot
Lack of hydraulic oil and excessive
air in the hydraulic system.
Check oil level for possible oil refilling.
Contact the dealer.
Oil leaks around
cylinder ram or
from other points.
Air sealed in hydraulic system while
operating.
Loosen Bleed Screw by 3 ~ 4 rotations
before operating the log splitter
Bleed Screw is not tightened before
moving the log splitter.
Tighten the Bleed Screw up before moving
the log splitter.
Oil Drain Bolt with Dipstick is not
tight.
Tighten the Oil Drain Bolt with Dipstick.
Hydraulic Control Valve Assembly
and / or seal(s) worn
Contact the dealer

12

13
Part#
Name
Specification
Quautity
1
Two-head bolt
4
2
oil cylinder
1
3
big spring
1
4
aluminum cover for oil cylinder
Ø55
1set
5
gasket ring
Ø5.3X1.8
1
6
bleed screw
M6X16
1
7
combined pad
1
8
oil ruler
1
9
pad for cylinder cover
30X3.55
1
10
CK style combined ring
1
1
11
piston
1
12
rubber pad
23.6X3.55
1
13
ST style combined ring
1
14
gasket ring
？
1
15
piston rod
1
16
nut
M14
2
17
handle
1
18
inner hexagon screw
M6X20
2
19
locknut
M14
2
20
cover for wheel
2
21
Circlip for shaft
12
2

14
22
wheel
2
23
back support
1
24
nut of non standard
M14
1
25
hydraulic button
1
26
cover type nut
M10
4
27
plug screw
M6X8
1
28
steel ball
SØ6
1
29
spring
Ø1.8X6.2
1
30
combined pad
Ø8
1
31
screw
M8X8
1
32
guard for handle
1
33
nut
M10
1
34
washer
10
1
35
aluminum block
1
36
spring
Ø0.8X7.8
1
37
combined pad
16
1
38
plug screw
M16
1
39
split washer
6
1
40
small spring
Ø1.2X29
1
41
small shaft
1
42
gasket ring
5.3X1.8
1
43
Inner bushing
1

15
44
gasket ring
10.6X1.8
5
45
gasket ring
55X3.1
1
46
plastic pad 1
1
47
main support
1
48
pushing plate
1
49
left guard
1
50
hexagon bolt
M6X12
4
51
worktable
1
52
nut
M6
2
53
bolt
M6X16
2
54
front support
1
55
right support
1
56
locknut
M10
4
57
inner hexagon screw
M10X20
4
58
locknut
M6
1
59
plastic pad 2
1
60
motor
1
61
key
4X2.5
1
62
Head Oilseal
1
63
fornt cover of motor
1
64
boolt
M8X35
1
65
footpad
2

16
66
bolt
M6X25
3
67
spring washer
6
3
68
washer
6
3
69
spindle sleeve without oil
2
70
middle board
1
71
straight pin
Ø8X25
2
72
gasket ring
46.2X1.8
1
73
gear
2
74
Steel Cable Baffle Ring
Ø10
1
75
driven shaft
1
76
gasket ring
Ø10X2.65
2
77
steel ball
SØ2.5
1
78
gear pump
1
79
bolt
M8X30
3
80
combined pad
8
3
81
washer
8
6
82
spring washer
8
6
83
bolt
M8X50
6