I have an electric, 7 ton, firewood splitter I purchased
from Sears mail order January 2015, 5 years ago. It is a Powerhouse model
LS7T-52 Log Splitter.
Problem –
The splitting hammer stopped advancing and then oil began
seeping from the motor on/off switch that is located on the side of the motor.
Solution –
I disassembled the hydraulic pump from the motor and
observed the seal in the pump that seals the hydraulic fluid in the pump
failed, allowing fluid to seep between the motor shaft and the seal into the
motor and then into the on/off switch box and from there to the floor.
The parts breakdown diagram in the Operation Manual did not
show this seal. I was able to read some numbers on the seal, although I did not
recognize the numbers as a part number for a time. The seal was 1.024 in
outside diameter and the motor shaft diameter was 0.432 inches. On the seal
were the numbers 11 at the 9 o’clock position, then 26 at the 6 o’clock
position and 7 at the 3 o’clock position. I now know these values are the
metric millimeter measurements of the seal. 11 millimeters is the shaft
diameter, 26 millimeters is the outside measurement and 7 millimeters is the
width of the seal.
I was able to order this sized from ebay for $5.99 that
includes shipping cost and was able to get the seal in 3 days.
I replaced the seal and reassemble the hardware but the
motor would not start until I hand spun the motor several turns. Something had
to seat apparently as the shaft turned easily after the couple of turns. Then
the motor started normally.
I also found some less viscosity hydraulic fluid which was
20 weight which is much closer to the 22 weight the operators manual calls for.
(It is possible the fluid I added before was 30 weight which could have
contributed to the failure, I suppose. However the reason I had needed to add
fluid was likely because the seal was seeping.)