June 1, 2015

How to change the hydraulic fluid in a log splitter

By Sears PartsDirect staff
How to change the hydraulic fluid in a log splitter.
How to change the hydraulic fluid in a log splitter.

Normal wear and tear will, over time, cause contamination and degradation of the hydraulic fluid in your log splitter. If left unchanged, contaminated and depleted hydraulic fluid will cause damage to the components of the hydraulic system.

For every 100 hours of operation, change the hydraulic fluid in the reservoir by following the steps listed below. Always stop the engine, disconnect the spark plug wire and relieve the hydraulic system pressure before you change the fluid.

  • Place an oil collection container under the tank.

  • Disconnect the suction hose from the bottom of the reservoir tank.

  • Unthread the inlet filter screen and clean it with penetrating oil.

  • Allow the fluid to drain into the oil collection container.

  • Reconnect the inlet filter screen and the suction hose.

  • Refill the tank using the recommended hydraulic fluid—check your owner's manual for the recommended hydraulic fluid for your model.

Always dispose of the used hydraulic fluid at an approved recycling center.

Symptoms common to all log splitters

Choose a symptom to see related log splitter repairs.

Main cause: worn hydraulic cylinder seals
Main causes: dirty carburetor, bad spark plug, clogged air filter, stale fuel
Main cause: worn hydraulic valve seals around the actuator rod
Main causes: leaky head gasket, damaged sump gasket, leaky oil drain plug, damaged fuel line, bad carburetor seals
Main causes: broken pump coupler, clogged hydraulic fluid filter, bad hydraulic control valve, broken hydraulic pump, bad hydraulic cylinder
Main causes: dirty carburetor, stale fuel, bad spark plug, broken recoil starter

Repair guides common to all log splitters

These step-by-step repair guides will help you safely fix what’s broken on your log splitter.

March 1, 2013
By Lyle Weischwill
How to replace a log splitter recoil starter

The recoil starter spins the engine on the log splitter when you pull the starter rope, and the rope retracts when released. If the recoil starter assembly is broken, follow the steps in this repair guide to replace it.

Repair difficulty
Time required
 15 minutes or less
How to replace a log splitter flexible pump coupler

The flexible nylon log splitter pump coupler deteriorates over time. Replace the flexible pump coupler if it begins to vibrate or rattles, which are early indications that it’s failing.

Repair difficulty
Time required
 15 minutes or less
March 1, 2013
By Lyle Weischwill
How to replace a log splitter fuel line

The fuel line carries the fuel supply from the gas tank to the carburetor. If the fuel line is cracked and leaking, replace it.

Repair difficulty
Time required
 30 minutes or less

Articles and videos common to all log splitters

Use the advice and tips in these articles to get the most out of your log splitter.

December 28, 2018

Find the right carburetor assembly for a Craftsman snowblower, tiller or log splitter

By Sears PartsDirect staff

This chart will help you find the right carburetor for your Craftsman snowblower, tiller or log splitter.

June 1, 2015

Log splitter common questions

By Sears PartsDirect staff

Learn more about your log splitter with these frequently asked questions.

June 1, 2015

How to change the hydraulic fluid in a log splitter

By Sears PartsDirect staff

Learn how to change the hydraulic fluid in your log splitter.