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4.
MAINTENANCE
4.1.
When the jack is not in use, the ram and the handle socket
should be in their lowest positions to minimise corrosion.
Remove the handle to deactivate the jack.
4.2.
Keep the jack clean and lubricate all moving parts on a
regular basis, pump grease into the grease nipple (fig.2).
4.3.
Before each use, check for broken, cracked, bent, or loose
parts, or any visible damage to ram, pump, saddle, lifting
arm, frame and all parts including nuts, bolts, pins and other
fasteners. If any suspect item is found remove jack from
service and take necessary action to remedy the problem.
DO NOT use the jack if believed to have been subjected to
abnormal load or shock load.
4.4.
Periodically check the pump piston and piston rod for signs
of corrosion. Clean exposed areas with a clean oiled cloth.
4.5.
After one year the oil should be replaced in order to extend
the life of the jack. Use hydraulic jack oil only.
IMPORTANT: Only fully qualified personnel should attempt
3
hydraulic maintenance or repair.
4.6.
To check the hydraulic oil level, fully lower the jack and the
handle and remove the oil filler plug (fig.2). The correct oil
level should be approximately 5mm below the filler opening.
If oil level is low, fill as required. Make sure that dirt is not
allowed to enter the hydraulic system. Carefully pump unloaded
jack 5 or 6 times to expel any air and then refit oil filler plug.
NOTE: Only use a good quality hydraulic jack oil.
WARNING: DO NOT use brake fluid, or any fluid other than
p
hydraulic jack oil, as this may cause serious damage to the
jack and will invalidate the warranty!
5.
TROUBLE SHOOTING
PROBLEM
POSSIBLE CAUSE
Jack will not lift
1)
Overloaded
the load
2)
Oil level low
3)
Release valve not correctly closed
4)
Air in system
5)
Piston rod not functioning
6)
Packing worn or defective
Jack does not lift
1)
Oil level too high or too low
high enough or
2)
Worn seals
feels "spongy"
3)
Air in system
4)
Release valve not closed
1)
Pump packing or valves malfunctioning
Jack lifts poorly
2)
Oil is dirty
3)
Air in the system
Jack lifts but will
1)
Release valve partially open
not hold load
2)
Dirt on valve seats
3)
Air in system
4)
Faulty seals
5)
Packing worn or defective
Jack will not lower
1)
Unit requires lubrication
completely
2)
Piston rod bent or damaged
3)
Jack frame/link system distorted due
to overloading/poor positioning
4)
Air in system
5)
Release valve partially open
6)
Jack spring damaged
Jack does not
1)
Release valve still closed
lower at all
Parts support is available for this product. To obtain a parts listing and/or diagram, phone 01284 757500.
NOTE: It is our policy to continually improve products and as such we reserve the right to alter data, specifications and component parts without prior notice.
IMPORTANT: No liability is accepted for incorrect use of this product.
WARRANTY: Guarantee is 12 months from purchase date, proof of which will be required for any claim.
3
REMEDY
1)
Be sure to use jack with adequate capacity
2)
Top up oil level
3)
Check and close release valve
4)
Open release valve and pump the handle a few times. Close valve and re-try
5)
Clean and replace oil
6)
Replace packing
1)
Top up oil level or remove excess oil
2)
Return jack to local service agent
3)
Open release valve and pump the handle a few times. Close valve and re-try
4)
Check and close release valve
1)
Replace packing and/or clean valves
2)
Replace oil
3)
Open release valve and pump the handle a few times. Close valve and re-try
1)
Check and close release valve
2)
Lower jack, close release valve. Place foot on front wheel and pull up lifting arm to it's full height by hand
Open the release valve to lower arm
3)
Open release valve and pump the handle a few times. Close valve and re-try
4)
Replace packing or contact local service agent
5)
Replace packing
1)
Oil all external moving parts
2)
Replace rod or contact local service agent
3)
Replace damaged parts or contact local service agent
4)
Open release valve and pump the handle a few times. Close valve and re-try
5)
Check and fully open release valve
6)
Replace spring or contact local service agent
1)
Check and fully open release valve
National Machinery,
Kempson Way, Suffolk Business Park,
Bury St. Edmunds,
Suffolk, IP32 7AR
Original Language Version
IMPORTANT: NO RESPONSIBILITY IS ACCEPTED FOR
INCORRECT USE OF THIS PRODUCT.
Hydraulic products are only repaired by local service agents.
We have service/repair agents in all parts of the UK.
DO NOT return jacks to us. Please telephone us on
01284 757500 to obtain the address and phone number of
your local agent. If jack is under guarantee contact your local
dealer.
De-commissioning the Jack
Should the jack become completely unserviceable and require
disposal, draw off the oil into an approved container and
dispose of the jack and the oil according to local regulations.
01284 757500
01284 703534
fig.2
NA3010
ISSUE No:1 - 01/10/12
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