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This heavy-duty dipper arm hydraulic cylinder is a direct plug-and-play aftermarket replacement exclusively customized for Komatsu PC200-7L standard chassis excavator and long-track PC200LC-7L medium digger. Serving as the core telescopic drive component of front digging attachments, it delivers reliable stretching and retracting power for road renovation, residential foundation excavation, pipeline laying and small aggregate yard loading. It is a hot-selling stocked spare part favored by municipal machinery maintenance stores, medium-sized excavation rental fleets and cross-border spare parts traders specializing in Komatsu 7L extended series medium excavators.
All manufacturing standards strictly comply with Komatsu original OEM engineering drawings and assembly tolerance requirements. Mount lug center distances, pin hole calibers, copper bushing inner diameters and hydraulic oil port layout fully match the dedicated part number 707-01-0A310. No cutting, grinding or welding modification is needed during on-site replacement, which effectively reduces maintenance labor input and shortens construction downtime caused by sudden equipment failure.
Basic Product Information Sheet
Item
Detailed Specification
Full Product Name
Complete Dipper Arm (Stick) Hydraulic Cylinder Assembly
Applicable Machinery
Komatsu PC200-7L Standard Track, PC200LC-7L Long Track Medium Excavator
12-month full warranty covering all factory manufacturing defects
Minimum Order Quantity
1 unit, sufficient spot inventory for quick shipment
QC Control Standard
ISO9001 full-process traceable production; 100% high-pressure airtight leakage test & full-stroke reciprocating fatigue test before packaging
2.Core Technical Parameters
#
Part No.
Description
Qty
G-1
(707-01-XZ841)
CYLINDER GROUP,(FINAL COATING)
1
G-1
(707-01-XZ840)
CYLINDER GROUP
1
----
====================
1
707-01-0A311
CYLINDER ASS'Y
1
1
(707-01-0A310)
CYLINDER ASS'Y
1
1
707-13-13540
Cylinder
1
2
707-76-80470
Bushing
4
3
07145-00080
SEAL,DUST (KIT)
4
4
707-58-95162
ROD,PISTON
1
4
(707-58-95161)
ROD,PISTON
1
5
707-27-13961
HEAD,CYLINDER
1
6
07179-13109
RING, SNAP
1
7
707-56-95510
SEAL,DUST (KIT)
1
8
707-52-90720
Bushing
1
9
707-51-95030
PACKING,ROD (KIT)
1
10
07000-15125
O-RING, TRANSFER GEAR
1
11
707-35-91370
RING,BACK-UP (KIT)
1
12
707-51-95640
RING,BUFFER (KIT)
1
13
01010-81875
BOLT (KIT)
12
14
707-41-11840
Washer
12
15
707-36-13771
Piston
1
16
707-44-13280
RING,PISTON (KIT)
1
17
707-39-13530
RING,WEAR (KIT)
2
18
707-44-13920
Ring
2
19
707-71-61070
PLUNGER
1
20
07000-15085
O-RING,(F5350-63A0 -4 )
1
21
707-35-90960
RING,BACK-UP (KIT)
2
22
01310-01216
SCREW,NYLON
1
23
707-71-70270
PLUNGER
1
24
07020-00000
FITTING, GREASE - UPPER HINGE PIN
1
25
707-71-32770
COLLAR
1
26
707-35-91370
RING,BACK-UP (KIT)
2
27
07000-15125
O-RING, TRANSFER GEAR
1
28
04260-00635
BOWL, CHECK VALVE
12
29
707-71-91270
Cap
1
29A
707-83-13010
Valve
1
29B
07750-01628
Spring
1
29C
707-87-14070
Plug
1
29D
07002-12034
O-RING,(FOR WITHOUT BRAKE ASSISTOR)
1
30
707-86-66270
Tube
1
31
20D-62-17860
Elbow
1
32
01435-01055
BOLT, MOUNT DRYER TO BRACKET AND FRAME
2
33
01435-01040
BOLT,(SHIM 3-PIECE)
2
34
07000-13030
O-RING,BOOM (FOR 50 FEET LONG FRONT)
1
35
01435-01075
BOLT (M10-1.50x75)
4
36
07000-13035
O-RING, UPPER COOLER INLET AND OUTLET PORTS
1
37
707-88-22530
Bracket
1
38
707-88-21261
BAND
1
39
01435-01030
BOLT - LOWER OIL COOLER OUTLET TUBEMOUNTING
2
40
707-88-11560
Plate
1
41
07283-22738
CLIP, SEAT
2
42
01599-01011
NUT,(WITH UNDER MIRROR)
4
43
01643-31032
WASHER,(WITH AUTO EMERGENCY STEERING)
4
----
====================
K
707-99-57160
SERVICE KIT
1
Technical Index
Standard Value
Cylinder Tube Inner Bore
115 mm
Hard Chrome Plated Piston Rod Diameter
75 mm
Effective Working Stroke
1270 mm
Rated System Operating Pressure
31.4 MPa
Factory Hydraulic Proof Test Pressure
47.1 MPa (1.5 times rated pressure for full internal and external leak detection)
Barrel Raw Material
High tensile seamless alloy steel with deep precision inner honing, forming a smooth low-friction inner wall resistant to long-hour medium-load hydraulic circulation abrasion
Piston Rod Surface Treatment
40CrMo quenched & tempered base substrate, 28–32μm dense hard chrome coating, surface hardness HRC68–72, excellent anti-scratch and anti-bending performance against daily collisions with gravel, tree roots and concrete edges on construction sites
Matching Dedicated Seal Kit PN
707-01-0A310-KIT
Applicable Operating Temperature Range
-25℃ ~ +85℃
Structural Feature
Thickened integrated arm connection lugs equipped with wear-resistant copper alloy self-lubricating bushings; single-stage built-in buffer valve to buffer end-stroke impact and lower vibration noise during frequent arm extension and retraction cycles
Core Competitive Advantages
Dual Chassis Compatible Design for PC200-7L & PC200LC-7L Long Frame Versions
The part number 707-01-0A310 corresponds to this exclusive stick cylinder assembly, which perfectly fits both standard and long-track PC200-7L variants without dimensional mismatch. All connection geometric sizes fully replicate genuine Komatsu OEM components, seamlessly docking original arm linkages and matched hydraulic pipelines. It completely avoids assembly offset issues that trigger premature seal aging and persistent oil leakage due to forced installation.
7L Extended Series Targeted Anti-Impact Reinforced Structure Upgrade
Compared with ordinary PC200-7 standard cylinder, this model optimizes the wall thickness of cylinder barrel and cast integrated lugs according to the longer arm design of 7L series excavators. It can withstand long-term alternating medium loads and accidental impact on various municipal construction sites, with a much longer service life than thin-wall universal aftermarket cylinders without targeted reinforcement.
Two Independent Offline Pre-Delivery Inspections Eliminate Hidden Defect Risks
Each finished cylinder undergoes two rounds of strict factory testing before warehousing. The full-stroke reciprocating fatigue test simulates uninterrupted all-day earthmoving work to verify overall structural stability; long-duration high-pressure soaking airtight inspection comprehensively scans all internal and external leakage points. All unqualified products are fully screened out to prevent unexpected construction shutdown losses for end customers.
Outstanding Cost Performance for Operators of Vintage Komatsu 7L Series Fleets
Genuine OEM spare parts for discontinued PC200-7L series are limited in supply and overpriced. This aftermarket stick cylinder achieves equivalent structural rigidity, smooth operation and service life as original Komatsu parts at a far more affordable unit price, effectively cutting long-term recurring maintenance costs for independent repair shops and rental enterprises equipped with batches of second-hand PC200-7L excavators.
Flexible Global Logistics Schemes to Meet Diverse Client Delivery Needs
All in-stock products can be dispatched within 3 working days after payment confirmation. Air express provides emergency rush delivery for sudden machine breakdowns at remote construction sites; consolidated bulk sea cargo and full FCL container shipping offer cost-saving wholesale transportation solutions for machinery distributors covering municipal construction markets across Africa, Southeast Asia and the Middle East.
Factory Production Strength Overview
Our factory owns over ten years of professional R&D and mass production experience in hydraulic cylinders for Komatsu 7/7L series medium excavators, covering the special long-frame PC200-7L and PC200LC-7L models. We have complete supporting production lines including heavy precision forging, deep inner honing, integral heat treatment and automatic chrome plating, equipped with professional load simulation test benches to restore real municipal construction working environments and continuously upgrade product anti-shock durability. Our construction-grade aftermarket hydraulic cylinder lineup is exported to dozens of regions worldwide all year round, gaining stable long-term cooperative trust and consistent favorable feedback from global compact machinery spare parts distributors relying on precise long-frame model matching and stable uniform quality output.
Regular Customer FAQ
Q1: Can this stick cylinder be installed on regular PC200-7 or PC210LC-7L excavators?
A: Cross-model compatibility is unavailable. Standard short-arm PC200-7 and other long-frame models adopt exclusive part numbers and unique lug mounting geometric dimensions without interchangeability. Please double-check the complete machine model before placing orders.
Q2: Does the standard delivery package include the matching seal repair kit?
A: Standard packaging only contains the complete dipper arm cylinder assembly. The dedicated 707-01-0A310-KIT seal kit needs separate purchase, and we provide discounted bundled quotations for customers ordering cylinder and seal kit together.
Q3: What anti-rust and anti-collision protective measures are adopted for long-distance ocean transportation?
A: Anti-rust hydraulic oil is fully injected into front and rear cylinder chambers to block internal corrosion; thick anti-rust grease is evenly coated over the entire exposed piston rod surface. The whole cylinder assembly is wrapped with multi-layer heavy waterproof PE film and fixed inside reinforced thick plywood export crates to avoid scratches, impact deformation and moisture erosion during lengthy cross-ocean transit.
Q4: Are tiered volume discounts available when purchasing a full boom + arm + bucket cylinder set for PC200-7L series?
A: Yes. Orders for complete front working device cylinder sets qualify for progressive bulk preferential pricing. Consolidated full-container sea shipping service is also supported to reduce overall international logistics expenses for large batch purchases.
Q5: What after-sales technical support can I obtain if oil leakage occurs within the 12-month warranty period?
A: Please provide clear photos of the leakage position and excavator serial number for verification. We will arrange free replacement sealing accessories and detailed step-by-step remote maintenance operation guidance in a timely manner to resolve leakage faults rapidly without delaying construction progress.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter,Trading Company
Year Established:
2013
Total Annual:
900000-3000000
Employee Number:
50~93
Ecer Certification：
Verified Supplier
GUANGZHOU BELPARTS ENGINEERING MACHINERY LIMITED founded in September 2013, loed in the engineering machinery market in Guangzhou, China. At present , we have one shop, one warehouse and one office as well as a professional team for purchasing, selling, packing, shipping and after-sale service.... GUANGZHOU BELPARTS ENGINEERING MACHINERY LIMITED founded in September 2013, loed in the engineering machinery market in Guangzhou, China. At present , we have one shop, one warehouse and one office as well as a professional team for purchasing, selling, packing, shipping and after-sale service....
