5. MAINTENANCE
5.2.5. Take small seal and piston (fig.5.7 & 8) and gently push them
down the narrow bore of the cylinder ensuring the metal piston
(8) is first, with the concave face pointing in the direction of the
T-handle, and the seal (fig.5.7) second, with the widest part of
the seal facing upwards towards the main cylinder (fig.5). Push
into bore as far as possible.
5.2.6. Pour 15grms of oil into the bore (fig.6). Insert larger seal (fig.7.6)
as shown, with the widest part of the seal facing downwards into
the bore. Push down into main cylinder as far as X (fig.7)
followed by piston (fig.7.4) and spring (fig.7.3).
5.2.7. Refit (do not overtighten) ram cover (fig.7.2) and replace T-
handle (fig.7.5).
p
p
WARNING! The correct orientation of pistons and seals in
the ram is critical.
5.2.8. Screw T-handle into ram until it contacts small piston and
then turn a further two or three times.
5.2.9. Remove T-handle and firmly bounce the ram piston (fig.8) on a
hard, but non-damaging, surface
6 to 10 times to consolidate the oil.
Replace the T-handle, wipe clean
and the ram is ready for use.
fig. 3
fig. 4
fig. 5
fig. 7
5.1.
GENERAL
5.1.1. Keep all items clean and lightly oiled. Keep all threads free from
grit and lubricate the ram regularly.
5.1.2. Store the ram in the closed position to prevent piston surface corrosion.
5.2.
TO CHANGE OIL IN RAM
IMPORTANT: The hydraulic system operates on a specially
formulated oil which must be replaced from time to time.
Use Sealey Hydraulic Jack Oil, available from your
authorised Sealey dealer. Quote model number:
HJO500MLS for 1 x 500ml bottle or PS982/OIL for 15grms
of oil for a single refill.
p
p
WARNING! Use of any other oil in ram may cause ram to
fail and will invalidate your warranty. Wear appropriate eye,
face and hand protection.
5.2.1. Dismantle by removing the ram cover (fig.3.2) with soft jaw grips
(fig.3.A) (body may have to be held in a soft jaw vice, ensure
body thread is not damaged).
Caution! The cover is spring
loaded, take care when removing.
Carefully remove
components 2, 3, and 4 from the cylinder.
5.2.2. Screw T-handle (fig.4.5) down as far as it will go, then unscrew
and remove it from the body (fig.4.5).
5.2.3. Push a narrow screw driver (fig.4.9), or a rod of appropriate
diameter, down the small opening in head of ram (B), in order to
push components 6, 7, and 8, plus the oil, out of the main
cylinder. Note: A medium force may be required.
5.2.4. Remove remaining oil from main cylinder, clean all components
fig. 6
fig.8
6.0. MAINTENANCE OF EARLY MODELS.
Please note that earlier models of the
PS990 were filled with a hydraulic
grease. For these models a small
amount of grease may be obtained by
quoting Part No. PS982/G.
p
WARNING!
Do not put oil into units
previously filled with grease as the
seals will be configured for grease only
and will leak if used with oil.
6.1 CONVERTING OLD UNITS TO OIL
The old type grease filled PS990 can
be converted for use with oil by
replacing the internal components with
those supplied in the repair kit
shown on left Part No PS982/8002. Do
not mix old and new components. A
single 15grm refill of oil may be
obtained by quoting Part No.PS982/OIL
6. SERVICE PARTS & NOTES
01284 757500
01284 703534
Sole UK Distributor
Sealey Group,
Bury St. Edmunds, Suffolk.
www.sealey.co.uk
Web
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.
INFORMATION:
For a copy of our catalogue and latest promotions call us on 01284 757525 and leave your full name, address and postcode.
PS990 - 4 - 030505
