COGENG 707-99-69710 Seal Kit Komatsu PC400-7 Arm Cylinder

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COGENG 707-99-69710 Premium Arm Cylinder Seal Kit for Komatsu PC400-7 Excavators

Name: COGENG 707-99-69710 Premium Arm Cylinder Seal Kit for Komatsu PC400-7 Excavators
Brand: Excavator Solenoid Valve | Excavator Pressure Switch | Excavator Revol

Product name: Komatsu Seal Kit
Part No: 707-99-69710 7079969710
Model Number:For PC400 PC450
Wheel Loaders & Others: 821F 821G 721F 721G
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

Technical Specifications & Performance Data

Parameter	Specification	Testing Standard
COGENG Part Number	COGENG-707-99-69710-ARM	Internal Quality Standard QS-508
Replaces OEM Part No.	Komatsu 707-99-69710	Direct OEM Replacement
Piston Seal Material	Polyurethane (PU) Grade 95A	ISO 6072
Rod Seal Material	Nitrile (NBR) with PTFE fill	ISO 6072
Wiper Material	Polyurethane double-lipped	ISO 6194
O-Ring Material	Nitrile (NBR) 70 Durometer	ISO 3601-1
Wear Band Material	PTFE-filled composite	ISO 6811
Backup Ring Material	Nylon 6.6	ISO 1874-1
Temperature Range	-40°C to +120°C (-40°F to +248°F)	ISO 2230
Pressure Rating	Up to 38 MPa (5510 PSI)	ISO 10766-1
Fluid Compatibility	Komatsu Super Hydraulic Fluid, mineral oil, synthetic	ISO 6743-4
Shelf Life	5 years in original packaging	ISO 2230

Component Specifications Table

Component	Material	Size Specification	Quantity	Function
Main Piston Seal	Polyurethane	140mm ID x 10mm width	1	Primary pressure sealing
Rod Seal	NBR with PTFE	100mm ID x 8mm width	1	Dynamic rod sealing
Buffer Seal	Polyurethane	140mm ID x 8mm width	1	Pressure peak protection
Wiper Seal	Polyurethane double-lipped	100.5mm ID	1	Contaminant exclusion
Wear Bands	PTFE composite	140mm OD x 8mm width	2	Piston guidance
O-Rings	Nitrile (NBR)	Various sizes AS568	6	Static sealing
Backup Rings	Nylon 6.6	Various sizes	3	Anti-extrusion support
Gland Gasket	NBR	105mm OD x 3mm CS	1	Gland static seal
Guide Rings	PTFE-filled fabric	140mm OD x 8mm width	2	Piston guidance

Compatible Excavator Models

Manufacturer	Model Series	Specific Models	Year Range	Serial Number Range
Komatsu	PC400-7	PC400-7 Standard	2004-2008	70001-71500
Komatsu	PC400-7	PC400-7 Dash 3	2005-2009	71501-73000
Komatsu	PC400-7	PC400-7 Dash 5	2006-2010	73001-74500
Komatsu	PC400-7	PC400-7 Dash 7	2007-2011	74501-76000

Arm Cylinder Specifications

Parameter	Specification	Tolerance	Application
Cylinder Bore	140 mm	+0.12/-0.00 mm	Main arm cylinder
Piston Rod Diameter	100 mm	+0.00/-0.06 mm	Chrome-plated rod
Stroke Length	1,585 mm	±4 mm	Arm extension range
Rod Finish	Hard chrome plated	Ra 0.2-0.4 μm	Surface roughness
Operating Pressure	34.3 MPa (350 kg/cm²)	±2%	System design pressure
Burst Pressure	68.6 MPa (700 kg/cm²)	+10%	Safety margin

Decompose pictures

Parts list

NO	Number	Name	Qty
G-1	707-01-XU801	ARM CYLINDER GROUP,(FINAL COATING)	1
	707-99-69710	SERVICE KIT	1
	707-01-0F711	CYLINDER ASS'Y	1
1	707-13-18760	• CYLINDER	1
2	707-76-11220	• BUSHING	1
3	07145-00110	• SEAL,DUST (KIT)	2
4	707-58-13190	• ROD	1
5	707-76-11220	• BUSHING	1
6	07145-00110	• SEAL,DUST (KIT)	2
7	707-71-31680	• COLLAR	1
8	707-35-91840	• RING,BACK-UP (KIT)	2
9	07000-15175	• O-RING (KIT)	1
10	707-71-61430	• PLUNGER	1
11	707-71-70340	• PLUNGER	1
12	04260-00952	• BALL	11
13	707-71-91230	• CAP	1
14	707-27-18180	• HEAD	1
15	707-56-13520	• SEAL,DUST (KIT)	1
16	07179-14146	• RING,SNAP	1
17	707-52-91070	• BUSHING	1
18	07179-13136	• RING,SNAP	1
19	707-51-13030	• PACKING,ROD (KIT)	1
20	707-51-13640	• RING,BUFFER (KIT)	1
21	707-35-91840	• RING,BACK-UP (KIT)	1
22	07000-15175	• O-RING (KIT)	1
23	01011-82400	• BOLT	12
24	707-88-75410	• WASHER	12
25	707-36-18530	• PISTON	1
26	01310-01225	• SCREW	1
27	707-44-18280	• RING,PISTON (KIT)	1
28	707-39-18510	• RING,WEAR (KIT)	2
29	707-44-18920	• RING	2
30	07001-05120	• RING,BACK-UP (KIT)	2
31	07000-15120	• O-RING (KIT)	1
32	707-86-12590	TUBE	1
33	707-86-11610	BLOCK	1
34	707-88-02960	PLATE	1
35	07372-21060	BOLT	4
36	01643-51032	WASHER	4
37	01011-81005	BOLT	4
38	01643-51032	WASHER	4
39	07000-13035	O-RING (KIT)	2
40	707-88-25450	BRACKET	1
41	707-88-21880	BAND	1
42	07372-21240	BOLT	2
43	01643-51232	WASHER	2
44	07283-33442	CLIP	2
45	01643-31032	WASHER	4
46	01597-01009	NUT	4
47	707-88-33040	CAP	3
48	07371-31049	FLANGE,SPLIT	6
49	07372-21035	BOLT	12
50	01643-51032	WASHER	12

Installation decomposition diagram
Pre-Installation Requirements:
Safety Preparation
Completely depressurize hydraulic system
Secure excavator on level ground with arm supported
Support arm cylinder properly during disassembly
Wear appropriate personal protective equipment
Workspace Preparation
Clean cylinder exterior thoroughly
Use clean, organized work area
Verify kit completeness before starting
Prepare proper seal installation tools

Installation Procedure:
Disassembly Steps
Mark cylinder components for reassembly alignment
Carefully remove gland nut and piston assembly
Document seal orientation and position
Clean all components with non-petroleum solvent
Seal Installation
Lubricate all seals with clean hydraulic fluid
Use seal installation tools - avoid sharp instruments
Ensure proper orientation of directional seals
Verify seals are fully seated in grooves
Reassembly Specifications
Gland nut torque: 750-800 Nm (553-590 ft-lbs)
Ensure proper rod alignment during assembly
Cycle cylinder slowly to distribute fluid

Commissioning Procedure:
Initial Operation
Cycle cylinder several times without load
Check for external leakage at all connections
Monitor hydraulic fluid temperature
Verify smooth arm movement
Performance Verification
Check for drift under load
Verify cylinder speed matches specifications
Monitor for unusual noises or vibration
Conduct operational testing with digging loads

Performance & Durability Data

Performance Parameter	Value	Test Method
Seal Life Expectancy	5,000 operating hours	ISO 7983
Friction Coefficient	0.06-0.10	ASTM D1894
Extrusion Resistance	45 MPa sustained	ISO 1829
Compression Set	<12% after 24h @ 100°C	ISO 815
Abrasion Resistance	>70,000 cycles	ISO 4649

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...

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

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+86 18529131515

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