Komatsu Backhoe Cylinder Seal Kits

Komatsu Backhoe Hydraulic Cylinder Seal Kits

Image	Fits Model	Description	Details	Part #	Price	Product Details
	See Details	WB140-2	Seal Kit, Dipper Arm Cylinder	878000490	$64.00	View Info
	See Details	WB140-2, WB140PS-2, WB150AWS-2N	Backhoe Boom Cylinder	878000489	$68.00	View Info
	See Details	WB140-2	Seal Kit, Boom Swing Cylinder Left-Hand	878000542	$48.60	View Info
	See Details	WB140-2	Boom Swing Cylinder	707-98-33500	$68.00	View Info
	See Details	WB146-5, WB146PS-5	Seal Kit, Backhoe Bucket Cylinder	707-99-26530	$70.02	View Info
	See Details	WB146-5, WB146PS-5	Arm Cylinder	707-99-35590	$64.00	View Info
	See Details	WB140PS-2, WB150-2, WB150AWS-2N	Seal Kit, Telescopic Arm Cylinder	878000388	$32.40	View Info
	See Details	WB150-2, WB150PS-2 , WB140PS-2N, WB150AWS-2N	Boom Cylinder	878000541	$104.00	View Info
	See Details	WB140PS-2N, WB150AWS-2N	Seal Kit, Dipper Arm Cylinder	878000491	$64.89	View Info
	See Details	WB140PS-2N, WB150-2, WB150AWS-2 (after serial # A40001) , WB140-2N (after serial # A20001) , WB150AWS-2N (after serial # A90001)	Seal Kit, Backhoe Bucket Cylinder	827020113	$29.47	View Info
	See Details	WB140-2	Seal Kit, Stabilizer Cylinder	707-98-34460	$58.00	View Info
	See Details	WB140-2	Seal Kit, Backhoe Bucket Cylinder	707-98-25830	$84.27	View Info
	See Details	WB140-2	Boom Cylinder	707-98-25090	$78.00	View Info
	See Details	WB140, WB140PS, WB150AWS	Boom Cylinder	878000486	$48.30	View Info
	See Details	WB140-2, WB140PS-2, WB150-2, WB150AWS-2, WB150PS-2	Cylinder Seal Kit	878000494	$38.08	View Info
	See Details	WB140-2, WB140PS-2, WB150-2N, WB150AWS-2, WB150PS-2	Seal Kit, Backhoe Bucket Cylinder	878000492	$54.00	View Info
	See Details	WB150AWS-2, WB91R-1/-2, WB93R-1/-2, WB95R-1, WB97R-1/-2, WB97S-2, WB98A-2	Cylinder Seal Kit	855660112	$45.64	View Info
	See Details	WB140-2, WB140PS-2, WB150-2, WB150AWS-2, WB150PS-2, WB91R-2, WB93R-2, WB97R-2, WB97S-2	Gasket Kit	878000487	$50.00	View Info
	See Details	WB150AWS-2, WB150-2, WB140PS-2N, WB140-2N (after serial # A20001), WB150AWS-2N (after serial # A40001, 150F80001)	Quick Coupler Cylinder Seal Kit	42N-879-1980	$24.00	View Info

Hydraulic cylinder seal kits for Komatsu backhoe loaders, covering boom, arm, bucket, stabilizer, telescopic arm, quick coupler, and swing cylinder applications across the WB140 and WB150 series machines. Kits are matched to specific cylinder positions and serial number ranges for accurate fitment.

Fits Models At A Glance

WB140 Series: WB140, WB140-2, WB140-2N, WB140PS, WB140PS-2, WB140PS-2N
WB150 Series: WB150, WB150-2, WB150-2N, WB150PS-2, WB150AWS, WB150AWS-2, WB150AWS-2N
WB90/WB91/WB93/WB95/WB97/WB98 Series: WB91R-1/-2, WB93R-1/-2, WB95R-1, WB97R-1/-2, WB97S-2, WB98A-2
WB146 Series: WB146-5, WB146PS-5

Key Notes

Cylinder Types Covered: Boom, arm, bucket, stabilizer/outrigger, telescopic arm, quick coupler, and boom swing cylinders
Serial Number Restrictions: Several WB140-2N and WB150AWS-2 kits apply only after specific serial number breakpoints — confirm before ordering
Wheel Loader Crossover: Some gasket and cylinder seal kits listed here also fit Komatsu WB-series wheel loader configurations
Left/Right Specificity: Boom swing cylinder kits are side-specific; verify left-hand vs. right-hand application before ordering

Why Choose Broken Tractor

✅ Broad WB-series coverage across multiple generations
✅ Detailed fitment data including serial number breakpoints
✅ Fast shipping from Baton Rouge, LA and Kimbolton, OH