Gojak 6313 Wheel Replacement are direct-fit polyurethane and phenolic wheels for the GoJak 6313 wheel dolly, rated for 1500 lb vehicle lifting and tire-saving floor contact.
- GoJak 6313 OEM wheel: 4" OD polyurethane, 3/4" axle bore
- Phenolic upgrade wheels handle heat and industrial tire chemicals
- Direct-fit retainer rings and axle bolts in-stock at our warehouse
GoJak model 6313 vehicle positioning dollies use a dedicated poly-on-steel-core wheel in the foot lever carriage plus four ground contact casters. When any of those wheels wears out, the GoJak stops lifting, stops steering, or stops rolling. Here is the fitment and step-by-step replacement guide.
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What is the GoJak 6313 and how do its wheels work
The GoJak 6313 is a foot-pump vehicle positioning dolly used by body shops, tow yards, and fleet maintenance shops. A pair of 6313 dollies lifts a vehicle by its tires and rolls it sideways in a tight space. The design depends on two different wheel systems working together.
- Cradle wheels: four small hard-polyurethane wheels that contact the vehicle tire inside the cradle. They roll as the cradle squeezes the tire
- Ground contact casters: four heavy-duty swivel casters that carry the combined weight of the dolly plus vehicle to the floor
- The ground casters are rated 1,500 lb each or higher because a GoJak holds up to 1,500 lb per dolly
- The cradle wheels are sized to match the diameter of typical passenger and light truck tires
- Replacement is straightforward with basic hand tools once you know which wheel set failed
Wheel parts on the GoJak 6313
Each 6313 dolly has eight total wheels across two distinct systems. Knowing which one failed narrows the replacement to the right fitment.
- 4 cradle wheels: small polyurethane on steel core, typically 3" diameter
- 4 ground contact swivel casters: 4" diameter, heavy-duty poly or iron
- Each cradle wheel has its own axle and sealed roller bearing
- Each ground caster bolts to the frame with four 3/8" or 1/2" bolts on a top plate
- Wheels and casters are sold individually or as a complete set
| Position | Qty per Dolly | Typical Size | Wheel Material |
|---|---|---|---|
| Cradle wheels | 4 | 3" dia | Hard poly on steel |
| Ground contact caster | 4 | 4" dia swivel | Poly or iron core |
How to identify which wheel set failed
GoJak problems usually manifest as one of four symptoms. Each symptom points to a different wheel set.
- Dolly will not roll smoothly on the ground: ground contact caster failure (bearing, flat-spot, or cracked tire)
- Cradle binds or will not close on tire: cradle wheel failure (axle seized, bearing failed, or wheel deformed)
- Dolly shimmies or pulls sideways: one ground caster swivel bearing failed, or swivel loose
- Unusual grinding under load: damaged wheel tire or debris in bearing
Engineer's tip from Jordan. Before you diagnose a wheel, check the obvious. I've had calls where a GoJak "failed" and it turned out the operator had jammed a bolt head under one caster. Sweep the shop floor, rotate the dolly through a full arc with no vehicle, and watch all four ground casters spin. If they all pass, then look at the cradle wheels.
Cradle wheel replacement, step by step
Cradle wheel replacement is the most common GoJak service. The cradle wheels do the work of gripping the tire and see the most wear.
- Disengage the dolly from any vehicle and open the cradle fully
- Remove the axle circlip or cotter pin with snap ring pliers or needle-nose
- Slide the axle out. Note washer order and any spacers
- Pull the old cradle wheel. Inspect the axle shoulder for wear
- Install the new wheel, reassemble washers and axle, secure the pin, spin-test by hand
Ground contact caster replacement
Ground casters take less time to replace than cradle wheels because they are plate-mounted. Four bolts each.
- Tip the dolly on its side on a blanket or low stand
- Remove the four mounting bolts holding the caster to the frame
- Lift off the old caster. Clean the mounting pad, inspect for corrosion
- Bolt the new caster in place. Use grade 8 hardware and lockwashers or thread locker
- Right the dolly and roll-test on a flat floor
Tools and parts you will need
A basic shop toolkit covers the full GoJak 6313 wheel service. No specialty tools required.
- 3/8" and 1/2" socket set with ratchet
- Snap ring pliers (internal and external)
- Needle-nose pliers
- Small mallet and brass drift for stuck bearings
- Torque wrench (25-35 ft-lb range)
- Replacement wheels and casters matched to GoJak 6313 spec
- Grade 8 bolts, lockwashers, and a small tube of medium-strength thread locker
Troubleshooting after the swap
If the dolly still does not roll or lift correctly after the replacement, work through these checks in order.
- All eight wheels spin freely by hand, no grinding or wobble
- Ground caster swivels rotate smoothly through 360 degrees
- Cradle closes on a test tire without binding or lifting unevenly
- Dolly rolls straight and tracks true when pushed with no vehicle on it
- With a vehicle loaded, cradle wheels rotate as the dolly moves (you should see the tire rotate if the wheels are free)
Frequently asked questions
What replacement wheels fit the GoJak 6313
The GoJak 6313 uses 3" diameter hard polyurethane wheels in the cradle and 4" swivel casters on the ground. CasterHQ stocks direct-fit replacements for both. Always specify which wheel you need when you order: cradle or ground contact.
How much does a GoJak wheel replacement cost
Individual cradle wheels run $25-$55 each depending on bearing grade and core material. Ground contact swivel casters run $35-$80 each. A full eight-wheel replacement on one dolly is typically $300-$500 in parts. Labor is roughly 2 hours at shop rates.
Are aftermarket GoJak wheels as good as OEM
Yes, when specified correctly. Aftermarket wheels matched to the same diameter, bore, hub length, and load rating perform identically to OEM. The wheel is commodity hardware. Stick with industrial-grade polyurethane on steel for the cradle and commercial heavy-duty casters for the ground, and you are fine.
Can I replace just one wheel or do I need all four in a set
For cradle wheels, replace in pairs at minimum. Four wheels squeeze the tire together, so they should wear together. If one is worn flat and the others are fine, replace all four as a set to keep grip even. For ground casters, replace in matched fronts or rears if possible.
My GoJak will not lift smoothly - is it a wheel problem
Not usually. Lift smoothness issues are typically a hydraulic pump or linkage problem, not a wheel problem. Wheels affect how the dolly rolls and how it closes on the tire, not the lift action itself. Check the pump actuation before ordering wheels if lift is the issue.
How long should GoJak wheels last in normal shop use
Ground contact casters typically last 3-5 years of moderate shop use. Cradle wheels see more direct wear and last 2-4 years. Heavy daily-use shops that position 20+ vehicles per day should plan annual inspection and 18-24 month replacement cycles.
Shop GoJak replacement parts
Cradle wheels, ground contact casters, bearings, and axle hardware for GoJak 6313 and similar vehicle dollies. Texas warehouse, same-day shipping.
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