COGENG 991/10142 Hydraulic Cylinder Seal Kit JCB

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COGENG 991/10142 JCB Hydraulic Cylinder Seal Kit

Name: COGENG 991/10142 JCB Hydraulic Cylinder Seal Kit
Brand: Excavator Solenoid Valve | Excavator Pressure Switch | Excavator Revol
Availability: InStock
Rating: 5 (1 reviews)

Product name:JCB Hydraulic Cylinder Seal Kit
Part No: 991/10142 991-10142 99110142
Size：60MM / 100MM
Model Number:For 3CX 3CXS-PC 3D 4CX 4CX-PC
Material:Lron+Rubber
Packing:PP bag inside, carton box outside
Payment Terms:Western Union, L/C, T/T, MoneyGram, D/A, D/P
MOQ:Acceptable trial order
Shipping Mode:By air, by sea, by express(Fedex, UPS, DHL, TNT, etc.)
Place of Origin:Guangdong, China
Brand name:COGENG
CertifiCATEEion:ISO9001
Supply :500PCS

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Desciption

PRODUCT IDENTIFICATION

Parameter	Specification
COGENG Part Number	991/10142 (99110142)
OEM Equivalent	JCB 991/10142, JCB 99110142
Product Type	Hydraulic Cylinder Seal Kit
Application	Bucket / Boom / Stabilizer / Steering cylinders
Kit Type	Complete overhaul seal kit
Compatible Models	Multiple JCB excavator, backhoe loader, and telehandler models

CROSS REFERENCE GUIDE

Brand	Part Number
COGENG	991/10142, 99110142
JCB	991/10142, 99110142
Interchange	991/10143, 991/10144, 991/00147, 991/00148

TECHNICAL SPECIFICATIONS

Material Specifications

Component	Material Grade	Hardness	Temperature Range
Piston Seals	Polyurethane (PU)	90-92 Shore A	-35°C to +110°C
Rod Seals	NBR + PTFE coating	85 Shore A	-40°C to +120°C
Wiper Seals	Polyurethane (PU)	88-90 Shore A	-35°C to +100°C
O-Rings	HNBR (Zetpol)	70 Shore A	-40°C to +150°C
Wear Rings	PTFE + Bronze filler	—	-50°C to +200°C
Backup Rings	Nylon 66 (Glass filled)	—	-40°C to +120°C
Buffer Seals	Polyurethane	90 Shore A	-35°C to +110°C

Decompose pictures

Installation decomposition diagram
Completely depressurize hydraulic system and secure all hydraulic functions
Stabilize machine on level ground with boom properly supported
Implement comprehensive lockout-tagout procedures
Wear appropriate PPE including hydraulic fluid protection
Professional Installation Procedure:

Pre-Installation Preparation：
Thoroughly clean cylinder exterior and connection points
Establish clean, organized work environment
Verify complete kit contents against component checklist
Document existing cylinder condition and configuration

System Disassembly：
Mark component orientation for precise reassembly
Photograph seal positions and directional orientations
Use specialized tools for seal removal without surface damage
Maintain strict contamination control throughout process

Component Inspection & Validation
Inspect rod surface for wear, scoring, or corrosion
Check cylinder bore for damage or irregularities
Examine gland and piston components for wear patterns
Verify all surfaces are clean and damage-free

Precision Seal Installation：
Liberally lubricate all seals with clean hydraulic fluid
Use certified seal installation tools only
Ensure correct directional orientation of all dynamic seals
Verify complete and proper seating in all grooves

Reassembly & Performance Verification：
Reassemble following documented orientation marks
Apply manufacturer-specified torque sequences
Conduct initial cycling without load to seat seals
Perform comprehensive leak and function testing

Frequently Asked Questions
A. When will get the items after I place order?
Q. Once your payment is confirmed,we will arrange the goods within 1~4 days; if not in stock, we will inform you before placing the order?
A. If I only know the excavator model, but can not offer parts No.,what should I do ?
Q. If possible, you can send us pictures of old products, nameplate or the size for reference.
A. How can you guarantee the quality??
Q. We will 100% test the goods before delivery. We also support video inspection.
A. How long will it take to delivery to my address??
Q. The normal delivery time is 3-7 days, depending on which country you are in.?
A : Which delivery method will you choose?
Q : By sea, air or express(DHL,Fedex,TNT, UPS, EMS etc.)，Sometimes we will arrange as the customer's demand.
A: What's package? Can you give me the package according my requirement??
Q. We usually packed by standard exported box or carton. And yes we can pack as per your requirement.
A: Can the price be cheaper?
Q: Of course, you will be offered a good discount for a big amount.

A: Why should I choose to buy from you?
Q:Our advantages: 100% quality assurance, develop and manufature follow original ones;Quick response within 24 hours; Small order allowed;Reasonable stock and timely delivery;Neutral packing, customized packing are allowed. Positive customer feedback from abroad market;Excellent after-sales service.
A : Which payment terms can you accept?
Q : Paypal. Western Union, Bank Transfer, T/T...

Contact COGENG

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About us: Welcome to the official website of GAOGENG(COGENG) has their own high-quality mining machinery components famous factory . We specialize in the production and distribution of top-notch products such as Excavator Solenoid Valve, Pressure Switch, Revolution Sensor, Wiring Harness, Throttle Motor, Oil Pressure Switch, and Water Temp Sensor, specifically designed for renowned brands in the mining industry:
Caterpillar®,JohnDeere®,Komatsu®,Case®,Volvo®,Hitachi®,Sumitomo®,Doosan®,Hyundai®,
Liebherr®,JCB®.

Products: Excavator Solenoid Valve; Excavator Wiring Harness; Excavator Motors; Excavator Pressure Sensor; Excavator Engine Oil Sensor; Excavator Water Temp Sensor; Excavator Control Panel; Excavator Switch Parts

Contact Us

Room B215, Building B, Yingfeng NO1192, Zhongshan Avenue Middle, Tianhe District GuangZhou

hugo@cogeng.net

+86 18529131515

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