CAT E312C Stick Cylinder Seal Kit OEM Arm Hydraulic Oil Seal Kit
Price:
Negotiable
MOQ:
2
Delivery Time:
1-7 days
Brand:
MSGB
Product Description
KM+PU high wear CAT E312C middle arm cylinder seal kit OEM anti-leak hydraulic repair spare parts for Cat 312CL excavator, factory wholesale with.
Core Product Features
- Complete full set configuration, all seals matched one by one per OEM specification, no missing accessories for on-site cylinder overhaul.
- Composite FKM+PU material: PU for dynamic friction part high abrasion resistance, FKM rubber resistant high temp & hydraulic oil swelling.
- Precision mould injection molding, tolerance controlled within ±0.03mm, close fit with cylinder groove & piston rod, no gap leakage after installation.
- Built-in POM back-up ring, effectively prevent seal extrusion damage under instant high pressure impact.
- External DKB dust wiper blocks mud, sand, gravel entering cylinder inner chamber, reduce inner seal abnormal wear.
- Anti-age formula raw material, resist hydraulic oil corrosion, avoid short-term hardening crack under long construction.
- Independent PE vacuum packaging + color export bag, prevent rubber ageing during long-term sea transportation storage.
Working Principle
- Rod seal closely cling on piston rod outer surface, block hydraulic oil leaking out from cylinder rod gap during reciprocating movement.
- Piston seal seal between piston & cylinder inner wall, stop hydraulic oil cross leakage between front & rear cavity of cylinder.
- HBY buffer ring absorb instant hydraulic pressure spike before main seal, reduce sudden high pressure impact damage to main oil seal.
- Outer dust wiper scrape mud and dirt on rod surface when arm stretch & retract, avoid pollutant into hydraulic system.
- O-ring + POM back-up ring fill assembly groove clearance, prevent seal extrusion under overload high pressure.
Product Application
- Full replacement spare for E312C middle arm cylinder maintenance when oil leaking,cylinder drift,lifting weakness happen.
- Solve core failure: outer oil leak, inner leakage leading arm sinking slowly, insufficient breakout force.
- Regular maintenance spare parts for CAT E312C excavator in quarry, road reconstruction, municipal demolition, earthmoving engineering.
- Bulk stocking spare for global construction machinery parts wholesaler & local excavator repair garage.
- Suitable for long-hour heavy-load operation under dusty, muddy open-air construction environment.
FAQ
Q1: Which excavator fits this E312C middle arm seal kit?
A1: Only for Cat E312C / 312CL excavator middle stick cylinder, OEM No:170-9999.
Q2: What material is your seal kit made of?
A2: High-performance FKM fluororubber + wear-resistant PU polyurethane + high elastic NBR nitrile rubber composite formula.
Q3: Why original seal leak quickly after short use?
A3: Original inferior single NBR rubber, poor oil resistance, easy ageing hardening under high temp hydraulic oil.
Q4: Can I buy one set sample first before bulk order?
A4: Sample order is available, large bulk order enjoys preferential unit price and priority shipment.
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Company
Guangzhou Liantuo Machinery Trading Company
Location
255 Zhongshan Ave, Maogang, Huangpu Dist, Guangzhou, Guangdong, China
Contact Person
liantuo