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MTD
Log Splitter

Model # 638 Official MTD log splitter

Here are the diagrams and repair parts for Official MTD 638 log splitter, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 97 parts  |
Lawn & Garden Equipment Hex Head Screw 710-0895

#106

All parts diagram

Lawn & garden equipment hex head screw

Part #710-0895

$8.20 | 
11% OFF Phone Price : $9.20
In Stock
Unknown Brand Name #689 Lawn Tractor Cotter Pin (replaces 01002627, 714-04039a) 714-0162

#2

All parts diagram

Unknown brand name #689 lawn tractor cotter pin (replaces 01002627, 714-04039a)

Part #714-0162

$7.57 | 
12% OFF Phone Price : $8.57
In Stock
Air Valve 734-0255

#4D

All parts diagram

Air valve

Part #734-0255

Replaced by #934-0255

?
Manufacturer substitution
This part replaces 734-0255. Substitute parts can look different from the original.
This item is not returnable
$5.43 | 
16% OFF Phone Price : $6.43
In Stock
Yard Machines Lawn Tractor Bolt (replaces 01000668, 1982728, 1983620, 43001, 715326, 910-0253, 9711, B1100046, Gw-325284, Gw-750a, Gw-90012, Gw-9711, Gw-98068, Gw-98-068, Gw-b1100046, Gw-b70235, Gw-m6520008, Gw-pt/01395/00, Gw-pt/80153/00, Gw-t70235, Wd- 710-0514

#12

All parts diagram

Yard machines lawn tractor bolt (replaces 01000668, 1982728, 1983620, 43001, 715326, 910-0253, 9711, b1100046, gw-325284, gw-750a, gw-90012, gw-9711, gw-98068, gw-98-068, gw-b1100046, gw-b70235, gw-m6520008, gw-pt/01395/00, gw-pt/80153/00, gw-t70235, wd-

Part #710-0514

This item is not returnable
$5.33 | 
16% OFF Phone Price : $6.33
In Stock
Screw 710-0253

#71

All parts diagram

Screw

Part #710-0253

Replaced by #710-0514

?
Manufacturer substitution
This part replaces 710-0253. Substitute parts can look different from the original.
This item is not returnable
$5.33 | 
16% OFF Phone Price : $6.33
In Stock
Toro Lawn & Garden Equipment Lock Washer (replaces 936-0169) 736-0169

#50

All parts diagram

Toro lawn & garden equipment lock washer (replaces 936-0169)

Part #736-0169

This item is not returnable
$5.26
In Stock
Valve 717-0899

#32

All parts diagram

Valve

Part #717-0899

Replaced by #918-0481A

?
Manufacturer substitution
This part replaces 717-0899. Substitute parts can look different from the original.
$332.74 | 
$12.00 OFF Phone Price : $344.74
In Stock
Log Splitter Adjustable Gib (replaces 781-0351-0637, 781-0637) 781-0351

#26

All parts diagram

Log splitter adjustable gib (replaces 781-0351-0637, 781-0637)

Part #781-0351

This item is not returnable
$29.03 | 
17% OFF Phone Price : $35.03
In Stock
Lawn & Garden Equipment Spring 732-0583

#21

All parts diagram

Lawn & garden equipment spring

Part #732-0583

This item is not returnable
$18.76 | 
10% OFF Phone Price : $20.76
In Stock
Square Key 714-0114

#77

All parts diagram

Square key

Part #714-0114

Replaced by #914-0114

?
Manufacturer substitution
This part replaces 714-0114. Substitute parts can look different from the original.
This item is not returnable
$5.91
In Stock

Most common symptoms to help you fix your log splitters

Choose a symptom to see related log splitter repairs.

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Why does my log splitter's hydraulic cylinder leak?

Main cause: worn hydraulic cylinder seals…

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Why does my log splitter's hydraulic valve leak?

Main cause: worn hydraulic valve seals around the actuator rod…

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Why won't my log splitter's hydraulic cylinder extend the wedge?

Main causes: broken pump coupler, clogged hydraulic fluid filter, bad hydraulic control valve, broken hydraulic pump, ba…

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Why does my log splitter's engine leaks oil or gas?

Main causes: leaky head gasket, damaged sump gasket, leaky oil drain plug, damaged fuel line, bad carburetor seals…

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Why does my log splitter's hydraulic pump leak?

Main cause: worn hydraulic pump seals…

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Why does my log splitter's engine run rough or misfire?

Main causes: dirty carburetor, bad spark plug, clogged air filter, stale fuel…

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Why won't my log splitter's engine start?

Main causes: dirty carburetor, stale fuel, bad spark plug, broken recoil starter…

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Most common repair guides to help fix your log splitters

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

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How to replace a log splitter flexible pump coupler

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 v…

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Repair difficulty
Time required
 15 minutes or less
How to replace a log splitter recoil starter

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 relea…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a log splitter carburetor

How to replace a log splitter carburetor

The carburetor mixes air and gas before the fuel mix goes to the engine. If the engine won't start and the spark plug is…

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Repair difficulty
Time required
 30 minutes or less

Effective articles & videos to help repair your log splitters

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

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

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

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

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How to maintain the hydraulic system in a log splitter

How to maintain the hydraulic system in a log splitter

See how to properly maintain the hydraulic system in your log splitter.…

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How to change the hydraulic fluid in a log splitter

How to change the hydraulic fluid in a log splitter

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

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