Product Details

990178 Top Roller for Caterpillar E120B Excavator Undercarriage Frame

Heat Treatment Strengthening

Heat treatment is a key process to improve the wear resistance and strength of the carrier roller. Usually, quenching is performed on core components such as the roller body, and some are combined with normalizing and tempering processes. This ensures the surface hardness of the carrier roller reaches HRC50 - 58, with the hardness layer depth controlled within 4mm - 10mm. It not only enhances the wear resistance of the roller body surface but also guarantees internal toughness, preventing the carrier roller from breaking under heavy loads.

Component Assembly

First, wipe the processed shaft clean and install it into the roller body. Then sequentially install bearings, floating seal rings, sealing rings, and inner/outer end caps at both ends of the roller body, and fix them with components such as elastic pins to prevent loosening. Before assembly, clean components like the roller body and shaft with a special cleaning agent to remove surface oil stains and iron filings. During assembly, apply grease to relevant parts to ensure smooth rotation. Afterwards, inject the specified type of lubricating oil through the oil hole, and finally tighten the oil plug and screws to ensure adequate lubrication.

There are more of spare parts for your reference:

Fit for BRAND	WSG CATALOGUE
	PC30	PC40	PC45	PC60	PC75	PC100	PC120	PC150	PC200
	PC220	PC300	PC350	PC400
	E70B	E110	E120B	E215	E235	E307	E311	E312	E322
	E180	E240	E200B	E320	E300	E300B	E330	E325
DAEWOO	DH55	DH200	DH220	DH280
For HITACHI	EX30	EX40	EX60	EX100	EX120	EX200	EX220	EX270	EX300
For HITACHI	EX400	EX600	UH043	UH052	UH053	UH07	UH081	UH082	UH083
FIAT	FH120	FH130	FH150	FH200	FH220	FH270	FH300
HYUNDAI	R55	R60	R70	R80	R110	R130	R150	R200
KATO	HD140	HD250	HD400	HD450	HD550	HD700	HD820	HD850	HD880
KATO	HD900	HD1220	HD1250
KOBELCO	SK40	SK60	SK100	SK120	SK200	SK220	SK04-2	SK07
KOBELCO	SK07N2	SK09	SK12	SK14	SK300	SK310	SK400
For MITSUBISHI	MS110	MS120	MS180	MS230	MS280
For SAMSUNG H.I.	MX8	SE200	SE210	SE280	MX292
SUMITOMO	SH70	SH100	SH120	SH160	SH200	SH260	SH265	SH280	SH300
SUMITOMO	SH340	LS2650	LS2800	LS3400	LS4300
BULLDOZER	D20	D3C	D30	D31	D37	D40	D41	D45	D50
	D53	D57	D58	D60	D63	D65	D68	D75	D80
	D85	D95	D135	D150	D155	D3	D3L	D3D
	D4	D4C	D4D	D4H	D5	D6	D6C	D6D	D6H
	D7	D7G	D8K	D8N

How to Identify the Condition of the Track Roller for Komatsu PC300-5

To determine whether the track roller of the Komatsu PC300-5 is in good condition, you can start from the following aspects:

1. Visual Inspection

Surface Wear Condition

Examine the surface of the track roller. If there are obvious scratches, grooves, or uneven wear—especially severe wear on the edges of the roller body—it indicates that the roller has been in use for a long time or is under uneven stress, and its quality may be poor.

Presence of Cracks

Carefully check the surface of the track roller and the spoke area. Even tiny cracks can cause the track roller to suddenly fail during operation, affecting the normal operation of the excavator.

Rust Condition

If there is extensive rust on the surface of the track roller, it will not only affect its appearance but also may weaken its strength and shorten its service life.

FAQ:

Q: How many days for delivery?
A: Standard delivery takes 10-20 days depending on quantity. Urgent orders can be accommodated upon request.
Q: Are you a manufacturer or trading company?
A: We are a manufacturer with over 20 years of production experience. Our trading subsidiary handles international operations.
Q: Can I get samples?
A: Yes, samples are available with prepayment of sample and freight costs, refundable upon order placement.
Q: How is quality guaranteed?
A: All products undergo strict testing procedures and must pass 100% quality inspection before shipment.
Q: What after-sales services do you provide?
A:
- 24/7 customer support response (including holidays)
- Technical support available anytime
- Free replacements for confirmed quality issues
Q: What payment methods do you accept?
A: We accept T/T, D/A, D/P, L/C, O/A and other preferred payment methods before shipment.