Ecer asks for your consent to use your personal data to:
Personalised advertising and content, advertising and content measurement, audience research and services development
Store and/or access information on a device
Your personal data will be processed and information from your device (cookies, unique identifiers, and other device data) may be stored by, accessed by and shared with 135 TCF vendor(s) and 65 ad partner(s), or used specifically by this site or app.
Some vendors may process your personal data on the basis of legitimate interest, which you can object to by do not consent. Contact our platform customer service, you can also withdraw your consent.
Your message must
be between 20-3,000 characters!
Submit Requirement
Thank You！
Your requirement has been sent. we will contact you quickly!
{"title":"CAT E312C Stick Cylinder Seal Kit OEM Arm Hydraulic Oil Seal Kit","imgUrl":"https:\/\/img.chinax.com\/nimg\/8a\/51\/00354d5997a7f1f96789eb87102f-200x200-1\/cat_e312c_stick_cylinder_seal_kit_oem_arm_hydraulic_oil_seal_kit.jpg","attrs":{"Model Number":"E312C","Inventory":"In Stock","Customize":"Yes","Excavator":"E312C"}}
{"title":"OEM Komatsu PC300-7 Excavator Hydraulic Cylinder Leakproof","imgUrl":"https:\/\/img.chinax.com\/nimg\/88\/cb\/7e162236bf8a2e6e2353b187d731-200x200-1\/oem_komatsu_pc300_7_excavator_hydraulic_cylinder_leakproof.jpg","attrs":{"Excavator Brand":"Komatsu","Factory Direct Supply":"Yes","Model Number":"PC300-7","Minimum Order Quantity":"10"}}
{"title":"242-6852 Hydraulic Arm Fits E330B E330 Excavator Leak Proof","imgUrl":"https:\/\/img.chinax.com\/nimg\/76\/d4\/99f706741fd53edda4968ea37ca5-200x200-1\/242_6852_hydraulic_arm_fits_e330b_e330_excavator_leak_proof.jpg","attrs":{"Oem":"Support","Place of Origin":"China","Model Number":"E330","Sealingtype":"High-quality rubber seals"}}
{"title":"Sany SY215 Excavator Hydraulic Cylinder Excavator Boom Arm Bucket Wear Resistant","imgUrl":"https:\/\/img.chinax.com\/nimg\/af\/cf\/98164c5d67c0cf111f3a0d8fa735-200x200-1\/sany_sy215_excavator_hydraulic_cylinder_excavator_boom_arm_bucket_wear_resistant.jpg","attrs":{"Brand Name":"MSGB","Excavator For":"SY215","Type":"Hydraulic Cylinder","Minimum Order Quantity":"1"}}
{"title":"CAT E374D 374F Excavator Hydraulic Cylinder Piston Rod OEM","imgUrl":"https:\/\/img.chinax.com\/nimg\/9d\/87\/cc12ebb0dbd8d643409e62eeadb5-200x200-1\/cat_e374d_374f_excavator_hydraulic_cylinder_piston_rod_oem.jpg","attrs":{"Model Number":"E374D 374F","Delivery Time":"1-7 days","Condition":"High Quality Factroy Direct Sale New","Minimum Order Quantity":"1"}}
{"title":"CAT E336 Excavator Hydraulic Cylinder Seal Kits Arm Oil Seal","imgUrl":"https:\/\/img.chinax.com\/nimg\/2f\/4b\/d3b54619e16f3179a073f1695b86-200x200-1\/cat_e336_excavator_hydraulic_cylinder_seal_kits_arm_oil_seal.jpg","attrs":{"Brand Name":"MSGB","Packaging Details":"Neutral Pakage","Brand Of Excavator":"for Cat Excavator","Factory Direct":"Yes"}}
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.
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.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2008
Total Annual:
20000000-25000000
Employee Number:
90~100
Ecer Certification：
Verified Supplier
Guangzhou Liantuo Machinery Trading Company is a professional cross-border supplier specializing in full-series excavator and construction machinery spare parts. We cover a complete product range, including hydraulic parts, undercarriage components, engine core parts, electrical control parts, sle...
Guangzhou Liantuo Machinery Trading Company is a professional cross-border supplier specializing in full-series excavator and construction machinery spare parts. We cover a complete product range, including hydraulic parts, undercarriage components, engine core parts, electrical control parts, sle...
