Excessive slop in a pivot joint or hydraulic cylinder pin causing unstable boom or stick movement on your Cat excavator? A worn 458-8691 sleeve bearing allows pin-to-bore clearance to grow until the joint knocks under load. RITO supplies this precision sleeve bearing to restore tight, knock-free pivot support.
Item NO.:
458-8691Order(MOQ):
1pcsPayment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time：
In Stock458-8691 Sleeve Bearing for Caterpillar excavator hydraulic system. Sleeve bearings at critical pivot joints maintain the pin-to-bore clearance required for smooth articulation and accurate load transfer. This bushing is machined from high-strength bearing bronze and features a lubrication groove to distribute grease evenly around the pin circumference under load.
| Part Number | 458-8691 |
|---|---|
| Part Name | Sleeve Bearing / Bushing |
| Compatible Brand | Caterpillar |
| Applicable Models | Caterpillar Excavator Hydraulic System |
| Application | Pivot pin support bushing in excavator linkage and hydraulic cylinder pin joints |
| Material | High-strength bearing bronze alloy |
| Product Color | Bronze / gold |
| Working Temperature | -30°C~+80°C |
| Key Function | Maintains precise pin-to-bore clearance at pivot joints to eliminate play and distribute load evenly |
| Condition | 100% New Aftermarket OEM Quality |
| Packaging | Wooden Case Reinforced Carton Neutral Packing Customized Box |
High-tin bronze alloy provides excellent conformability under high surface contact pressure, preventing pin scoring even when grease film momentarily breaks.
Helical or circumferential grease groove distributes lubrication evenly around the pin bearing area, extending re-grease intervals and reducing joint wear rate.
Outer diameter machined to OEM press-fit tolerance for secure installation in the housing bore without rotation or fretting that loosens the bearing over time.
Surface finish controlled to allow initial bedding while providing long-term wear resistance against the chrome-plated or hardened pin surface.
FAQ
Q: How do I tell when the 458-8691 sleeve bearing needs replacing?
A: Audible knock or clunk when reversing boom or stick load direction, visible movement at the pivot pin during loading, abnormal wear marks on the pin surface, and pin-to-bore clearance exceeding OEM service limit (typically 1.0-1.5 mm).
Q: Should I replace the pin at the same time as the 458-8691 sleeve bearing?
A: Measure pin diameter. If wear exceeds 0.5 mm below OEM nominal or there are deep score marks on the pin surface, replace pin and bushing together. A new bushing running on a scored pin will wear out in a fraction of normal service life.
Q: What is the correct interference fit for pressing in 458-8691?
A: Press-fit interference is typically 0.05-0.10 mm depending on housing material. Chill the bushing in dry ice or heat the housing bore before pressing to avoid distorting the bore. Confirm with OEM service manual for the specific joint.
Q: How to confirm 458-8691 is the correct bushing for my Cat excavator?
A: Match bore ID, outer diameter and length of the old bushing and confirm the part number 458-8691. Provide machine model and serial number to our team for application cross-reference.
Q: What quality options are available?
A: We provide original, OEM and high-quality aftermarket versions with stable supply capability.
Q:Why Choose RITO?
A:Listed Factory
Stable&Reliable Quality
OEM Factory for Chinese Top Excavator Brands
Supplier to Fortune 500 Companies
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