CALL or TEXT (800) 909-7060

Parts Request Blog About Us Contact Us Account

Cat D6 Series Dozer Hydraulic Cylinders

Cat D6 Series Dozer Hydraulic Cylinders parts list
Image	Fits Model	Description	Details	Part #	Price	Product Details
	See Details	D6H	Cylinder Group		1U3990	$4,085.00	View Info
	See Details	D6R, D6R II	Bulldozer Lift Cylinder Group		1294258	$6,790.00	View Info
	See Details	5S, D6D, D6E, D6E SR, D6F SR, D6G, D6G SR, D6G2 LGP, D6G2 XL, D6G2	Lift Cylinder Group		8J6868	$3,161.00	View Info
	See Details	D6K (NCF, DHA, FBH, HMG), D6K2 (MXK, RPR, RST, WMR)	Blade Lift Cylinder with Bushings		269-2730	$1,598.00	View Info
	See Details	D6K (NCF, DHA, FBH, HMG), D6K2 (MXK, RPR, RST, WMR)	Lift Cylinder with Bushings		379-3505	$1,598.00	View Info
	See Details	D6R, D6R II	Bulldozer Lift Cylinder Group		1278931	$4,255.00	View Info
	See Details	D6M, D6M XL, D6M LGP, D6N XL, D6N LGP, 527, 12H, 140H	Angle Cylinder (Less Bushings)		0	152-6485	$1,645.00	View Info
	See Details	D6K LGP, D6K XL *(DHA, NCF, FBH, HMG)	Blade Angle Cylinder		269-2728	$1,682.00	View Info
	See Details	D4, D6K, D6K2	Angle Cylinder with Bushings		379-3504	$1,680.00	View Info
	See Details	D6N	Tilt Cylinder Group		3284267	$3,374.00	View Info
	See Details	D4 (AX9, FRP, JPH, MTT, RKR, STT, EJK, H3C, K3G, KWM, RLT, S4A), D6K (6S6, MP7, ZLJ), D6K2 (7P6, EL7, MGM, MXK, RPR, JTR, RST, DFR, WMR)	Tilt Cylinder with Bushings		379-3503	$1,434.00	View Info
	See Details	D6R, D6R III, D6R STD, D6T, D6T LGP, D6T XL, D5R2 XL, D6N, D6N XL, D6R2	Tilt Cylinder Group		3679478	$4,085.00	View Info
	See Details	D5R LGP, D6M, D6N, D6N LGP, D5R XL, D5R2 XL	Bulldozer Lift Cylinder Group		1103269	$2,178.00	View Info
	See Details	D6H XL, D6R, D6R II, D6H, D6H II XL	Tilt Cylinder Group		1662582	$4,290.00	View Info
	See Details	D5H, D5H XL, D6H, D6H II, D6H XL, D6H XR, D6M, D6N, D6R, D6R II	Ripper Lift Cylinder Group		9T2716	$3,241.00	View Info
	See Details	5S, 6A, 6S, D5B, D6D	Cylinder Group		7J8301	$1,070.00	View Info
	See Details	D6H XL, D6R, D6R II, D6H, D6H II XL	Cylinder As Cylinder Group		1662583	$1,678.00	View Info
	See Details	5S, D6D, D6E, D6E SR, D6G, D6G SR, D6G2 LGP, D6G2 XL, D6G2	Cylinder Tube		8J6867	$955.00	View Info
	See Details	D6M, D6N	Hydraulic Cylinder Tube		3217046	$1,380.00	View Info
	See Details	D6H, D6H II, D6H XL, D6H XR	Hydraulic Cylinder Tube		9T8953	$1,315.00	View Info
	See Details	D6R, D6R II	Hydraulic Cylinder Tube		1278932	$2,137.00	View Info
	See Details	D5H XL, D6M XL, D6M LGP, D6N XL, D6N LGP	Angle Cylinder Seal Kit		0	111-3302	$75.00	View Info
	See Details	D5H XL, D6M XL, D6M LGP, D6N XL, D6N LGP	Swivel Bushing, Blade Angle Cylinder		4D4431	$58.00	View Info
	See Details	D5H XL, D6M XL, D6M LGP, D6N XL, D6N LGP	Snap Ring		0	2H5549	$12.00	View Info
	See Details	D5H XL, D6M XL, D6M LGP, D6N XL, D6N LGP	Angle Cylinder Pin (Tube End)		124-5741	$87.00	View Info
	See Details	D5H XL, D6M XL, D6M LGP, D6N XL, D6N LGP	Angle Cylinder Pin (Rod End)		3G8932	$70.00	View Info

Cat D6 Series Dozer Hydraulic Cylinders

This category covers blade lift cylinders, blade angle cylinders, blade tilt cylinders, ripper lift cylinders, complete cylinder groups, cylinder tubes, seal kits, bushings, and pins for Caterpillar D6 series crawler dozers. The D6 badge runs from the cable-era D6D and D6E through the D6G, the elevated-sprocket D6H, the D6M and D6N, the big D6R and D6T, and the low-drive D6K and D6K2 — each with its own cylinder set. This page pulls together every cylinder and rebuild part that fits across those generations. Broken Tractor stocks complete assemblies, cylinder tubes, and rebuild components, all ready to ship.

Fits Models At A Glance

D6D, D6E, D6E SR, D6F SR, D6G, D6G SR, D6G2, D6G2 LGP, D6G2 XL, D6H, D6H II, D6H XL, D6H XR, D6K, D6K LGP, D6K XL, D6K2, D6M, D6M XL, D6M LGP, D6N, D6N XL, D6N LGP, D6R, D6R II, D6R III, D6R STD, D6R2, D6T, D6T LGP, D6T XL — with shared ripper and lift groups fitting D5H and D5R machines

Serial-number note: D6K and D6K2 cylinders split by serial prefix (NCF, DHA, FBH, HMG on the D6K; MXK, RPR, RST, WMR on the D6K2). The older D6D/D6 blade cylinders carried their own 4F or 8F cylinder-group numbers stamped on the cylinder itself. Confirm your serial number or cylinder casting number before ordering.

What's In This Category

Complete Cylinder Groups — D6H, D6R & D6T

Cylinder groups (1U3990), tilt cylinder groups (1662582, 3679478, 3284267), bulldozer lift cylinder groups (1294258, 1278931), and cylinder-as-cylinder groups (1662583) for the D6H, D6H XL, D6R, D6R II, D6R III, D6N, and D6T. These are the heavy production cylinders for the elevated-sprocket and finger-tip-control machines.

Cylinder Tubes — D6H, D6M, D6N & D6R

Hydraulic cylinder tubes for the D6H series (9T8953), D6M and D6N (3217046), D6R and D6R II (1278932, 1662583-family), and the 5S/D6D/D6E/D6G group (8J6867). Replace the tube when the bore is scored but the rod and gland are still serviceable.

Complete Cylinder Assemblies — D6K & D6K2

Lift cylinders with bushings (379-3505, 269-2730), tilt cylinders with bushings (379-3503), angle cylinders with bushings (379-3504), and blade angle cylinders (269-2728) for the D6K, D6K LGP, D6K XL, and D6K2. These low-drive cylinders are model-specific and split by serial prefix.

Lift & Ripper Cylinder Groups

Ripper lift cylinder group (9T2716) for the D6H through D6R, lift cylinder group (8J6868) for the D6D/E/G, bulldozer lift cylinder group (1103269) for the D6M and D6N, and the 7J8301 cylinder group for the D5B and D6D. Cross-machine groups that cover both D5 and D6 platforms.

Angle Cylinders, Seal Kits, Pins & Bushings — D6M & D6N

Angle cylinders less bushings (152-6485) for the D6M XL, D6M LGP, D6N XL, and D6N LGP, plus the matching angle cylinder seal kit (111-3302), tube-end pins (124-5741), rod-end pins (3G8932), swivel bushings (4D4431), and snap rings (2H5549). Everything to rebuild the D6M/D6N angle cylinder without buying a complete assembly.

Fitment Tip

The D6 line spans decades of very different machines, so identifying the right cylinder starts with your exact model and serial number. The D6K and D6K2 are low-drive hystat machines with their own cylinder set (379-3503, 379-3504, 379-3505, 269-2728, 269-2730) that splits by serial prefix — NCF, DHA, FBH, HMG on the D6K. The D6M and D6N share the 152-6485 angle cylinder and 111-3302 seal kit. The D6H, D6R, and D6T use the big cylinder groups (1662582, 3679478, 1294258). On older D6 and D6D machines, the blade cylinders carry their own 4F or 8F cylinder-group numbers stamped right on the cylinder — check there if the machine serial doesn't cross-reference. The D6 serial number is on the mainframe near the operator's cab or high on the left rear frame rail on larger machines. Call us with your serial or cylinder casting number and we'll confirm the right part before you buy.

Frequently Asked Questions

Which hydraulic cylinders fit my Cat D6K or D6K2 dozer?

The D6K and D6K2 use a dedicated low-drive cylinder set: lift cylinder with bushings 379-3505 or 269-2730, tilt cylinder with bushings 379-3503, angle cylinder with bushings 379-3504, and blade angle cylinder 269-2728 for LGP and XL configurations. These split by serial prefix — NCF, DHA, FBH, and HMG on the D6K, and MXK, RPR, RST, WMR on the D6K2. Confirm your prefix before ordering.

What angle cylinder seal kit fits the Cat D6M and D6N?

The angle cylinder seal kit for the D6M XL, D6M LGP, D6N XL, and D6N LGP is part number 111-3302. It also fits the D5H XL. If the cylinder bushings or pins are worn, order the swivel bushing (4D4431), tube-end pin (124-5741), rod-end pin (3G8932), and snap ring (2H5549) at the same time to do a complete rebuild.

Can I replace just the cylinder tube on my Cat D6R instead of the whole cylinder?

Yes. Broken Tractor stocks hydraulic cylinder tubes separately for the D6R and D6R II (1278932), D6H series (9T8953), and D6M/D6N (3217046). If the cylinder bore is scored but the rod, gland, and piston are still good, replacing just the tube is far cheaper than a complete cylinder group. Inspect the rod and gland before ordering to confirm they're reusable.

How do I identify the right blade lift cylinder for an older Cat D6 or D6D?

Older D6 and D6D bulldozer cylinders were listed in a separate hydraulics parts book with their own cylinder-group numbers — early groups like 4F8659 (RH) and 4F8660 (LH), or late groups like 8F1123 (RH) and 8F1124 (LH). The machine serial number often won't cross-reference directly, so look for the 4F or 8F casting number stamped on the cylinder itself. That number is the fastest way to match the correct replacement.

What's the difference between the D6N tilt cylinder groups 3284267 and 3679478?

Both are tilt cylinder groups that fit the D6N, but 3284267 is specific to the D6N, while 3679478 is a broader group covering the D6R, D6R III, D6R STD, D6T, D6T LGP, D6T XL, D5R2 XL, D6N, D6N XL, and D6R2. If you have a D6N, either can apply depending on your blade configuration — confirm your serial number and blade setup before ordering.

Where is the serial number on a Cat D6 dozer?

The D6 serial number is typically stamped on the mainframe near the operator's cab, or on larger models high on the left rear frame rail (sometimes hidden by a ripper attachment). Pre-2001 machines use an 8-digit serial like 9PN00927; 2001 and newer machines use a 17-digit VIN. You need this number because D6 cylinders vary significantly by model and serial prefix across the D6K, D6M, D6N, D6R, and D6T.

Not sure which cylinder, tube, or seal kit 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.

Privacy Policy | Terms & Conditions

Building Quality Since 2006 | Copyright © 2026 Broken Tractor LLC - All Rights Reserved