Cat 988 Series Wheel Loader Cylinders

Cat 988 Series Wheel Loader Cylinders parts list
Fits Model	Description	Details	Price	Product Details
See Details	988B	Hydraulic Cylinder Tube	4T7587	$2,487.00	View Info
See Details	834B, 836, 988B, 988F, 988F II	Sem. Cylinder Tube	9J8166	$1,362.00	View Info
See Details	834B, 836, 988B, 988F, 988F II	Steering Cylinder Group	9J8165	$3,136.00	View Info
See Details	988B, 988F, 988F II	Tilt Cylinder Group	9J3632	$6,638.00	View Info
See Details	988G, 988H	Steering Cylinder Group	2594737	$3,089.00	View Info
See Details	988G, 988H	Steering Cylinder Group	2594733	$3,792.00	View Info
See Details	988H	Steering Cylinder Group	2880568	$3,915.00	View Info

Cat 988 Series Wheel Loader Cylinders

Tilt cylinders, steering cylinders, and hydraulic cylinder tubes for Caterpillar 988 series wheel loaders. Whether you need a complete cylinder group or just the tube to rebuild a scored bore, Broken Tractor stocks the cylinders that curl the bucket and steer your machine — all built to accept OEM-style seal kits.

Fits Models At A Glance

988B, 988F, 988F II, 988G, 988H — with shared steering and tube groups fitting the 834B and 836 wheel dozers

What's In This Category

Tilt Cylinder Groups

Tilt cylinder group (9J3632) for the 988B, 988F, and 988F II. Curls the bucket for digging and dumping on these large production loaders.

Steering Cylinder Groups

Steering cylinder groups for the 988G/988H (2594733, 2594737, 2880568) and the group (9J8165) shared across the 834B, 836, 988B, 988F, and 988F II. Restore hydraulic steering response on the articulated frame.

Hydraulic Cylinder Tubes

Cylinder tube (4T7587) for the 988B and the semi-finished tube (9J8166) covering the 834B, 836, 988B, 988F, and 988F II. Replace the tube when the bore is scored but the rod and gland are still good.

Fitment Tip

The 988 changed steering cylinders between the B/F and G/H generations, and several of its cylinders and tubes cross over to the 834B and 836 wheel dozers that share the same frame. Match your model suffix and the casting number stamped on the cylinder when rebuilding. The serial number is on the left (highway) side of the machine behind the front tire. Call us with your serial and cylinder number and we'll confirm the right part.

Frequently Asked Questions

What steering cylinder fits my Cat 988G or 988H?

The 988G and 988H use steering cylinder groups 2594733, 2594737, and 2880568. The older 988B and 988F use the 9J8165 group, which also fits the 834B and 836 wheel dozers. These don't interchange between generations, so confirm your serial number and casting number before ordering.

Do the 988 cylinders fit the Cat 834B or 836 wheel dozer?

Some do. The 9J8165 steering cylinder group and the 9J8166 semi-finished cylinder tube are shared across the 834B, 836, 988B, 988F, and 988F II because these machines share frame and hydraulic components. Confirm by serial number and casting number, since visually similar cylinders can differ in stroke.

Can I replace just the cylinder tube on my Cat 988?

Yes. Broken Tractor stocks 988 cylinder tubes separately — 4T7587 for the 988B and the 9J8166 semi-finished tube for the 834B/836/988B/988F. If the bore is scored but the rod, gland, and piston are still good, replacing just the tube saves thousands over a complete cylinder group. Inspect the rod and gland first to confirm they're reusable.

Where is the serial number on a Cat 988 wheel loader?

On the 988, the serial number is on the left (highway) side of the machine behind the front tire. Pre-2001 machines use an 8-digit serial; 2001-and-newer machines use a 17-digit VIN. You need this number, plus the cylinder casting number, to order the correct cylinder or tube.

Not sure which cylinder or tube fits your machine? Call or text us at (800) 909-7060 or submit a parts request and we'll match it to your serial number.