Craftsman 247.799640 - Manual (Page 30)

Seal kits for the new cylinders are the same as for the old cylinders, as all the internal components are the same.
bore dram
4.0"
4.5"
To:
Re;
old cylinder
718-0307
718-0306
new c>1inder
718-0773
718-0769
seal kit
753-0490
753-0563
DISTRIBUTORS & AUTHORIZED SERVICE DEALERS
LOG SPLITTER SEAL KITS
As of February 1, 1999, log splitter cylinders under warranty capable of being repaired with a seal
kit must be repaired. Any cylinders replaced under warranty will be called back for inspection. Any
cylinder found to be repairable will be returned to the dealer and the dealer will be charged back the
amount paid on the claim for the cylinder. Labor already paid will not be charged back. If replacement is
determined to have been the only solution to the problem, no action will be taken. If you have any
questions regarding this policy or how to handle a situation please contact MTD service.
If you need a pressure test kit {part # 759-3742), contact your central distnbiitor. This kit includes
an instructiona! video and is available for loan or purchase. You will bs reimbursed for the cost of
shipping and handling on a warranty job if you used a test kit on loan and include the amount on the claim
form.
Seal kits are as follows.
CYLINDER NUMBER CYLINDER Í.D. SEAL KIT
^¿4 jgi 718-0306 4.5" 753-0563
sib
718-0307 4.0" 753-0490
718-0312 4.25" 753-0637
718-0313 5.0" 753-0564
Best Metal cylinders (thread on end cap):
CYLINDER NUMBER CYLINDER LD. SEAL KIT
718-0307 4.0" 753-0689
718-0313 5.0" 753-0691
1
.
2
.
3.
4.
5.
6.
7.
9.
10,
Procedure for ReseaUng Hydraulic Cylinders
(On Machine - Fisher Cylinders - Snap-Ring Type)
Clean cylinder, wedge and beam area.
Fully retract cylinder rod into cylinder - stop engine.
With engine off, move control valve back and forth several times to be sure there is no pressure in system.
With a clean catch container in place, disconnect pump to control valve hose from pump fitting and insert end
into container. Plug fitting on pump with plastic cap or tape. This is to prevent dirt from entering fitting.
Remove (4) bolts securing the log disiodger and remove dislodger.
Remove 14 bolt through wedge and cylinder rod. Slide wedge all the way forward on the beam till it meets the
base plate. No need to remove wedge from beam.
Lift rod up and place wood block under cylinder barrel to hold assembly at an angle, This will allow for rod
removal. ,
Place control valve into detent position '
Using a wood dowel or a hammer handle, tap cylinder rod cap into cylinder just beyond the snap ring. Do not go
any farther than necessary as it will make further disassembly very difficutt. Remove snap nng from groove
being careful not to scratch groove or bore, [f you do, you must polish scratched area with fine emery so scratch
won t damage new seals as they pass the area. It is an easy job if you tap one end of snap ring into the cylinder ■
first, and then get a medium screwdriver under the ring to pry it out.
Reconnect and tighten hose to pump.