Technical Specifications & Performance Data
| Item | Specification / Value |
|---|---|
| Kit Part Number | 707-99-43740 (COGENG) |
| OEM Reference | Komatsu genuine equivalent |
| Application | Blade Tilt Cylinder Rebuild |
| Pressure Rating | Max 35 MPa |
| Temperature Range | -30°C to +110°C |
| Seal Material (Primary) | Nitrile Rubber (NBR) |
| Rod Wiper Material | Polyurethane (PU) |
| Includes | Piston seals, rod seals, O-rings, backup rings, wipers, gland seals |
| Package Content | Full seal set for one cylinder |
Component Specifications Table
| Component Name | Material | Hardness (Shore A) | Quantity per Kit |
|---|---|---|---|
| Piston Seal | NBR | 85 ± 5 | 2 |
| Rod Seal | NBR/PU | 90 ± 5 | 2 |
| Wiper Seal | PU | 92 ± 5 | 1 |
| O-Ring (Gland) | NBR | 70 ± 5 | 4 |
| Backup Ring (Rod) | PTFE | – | 2 |
| Wear Ring (Piston) | Filled PTFE | – | 2 |
Compatible Which models is it used for Models
| Model Series | Model Examples (Komatsu) |
|---|---|
| Crawler Dozers | D65EX, D65PX, D65WX, D65EX-12, D65PX-12 |
| D85EX, D85PX, D85ESS, D85WS | |
| D155AX, D155A, D275AX | |
| Crawler Tractors | D61EX, D61PX, D61EX-12 |
| D37EX, D39EX, D39PX | |
| Note: | Always verify model and cylinder serial number before ordering. Suitable for machines using the Komatsu blade tilt cylinder assembly referenced in parts manual under 707-99-43740. |
| NO | Number | Name | Qty |
| K01 | 14X-22-05010 | Service Kit, Steering | |
| 02896-61012 | • O-ring | 1 | |
| 02896-61018 | • O-ring | 2 | |
| 07000-72018 | • O-ring | 21 | |
| 07000-72065 | • O-ring | 1 | |
| 07000-72095 | • O-ring | 1 | |
| 07000-73022 | • O-ring | 17 | |
| 07000-73032 | • O-ring | 1 | |
| 07000-75180 | • O-ring | 2 | |
| 07000-75365 | • O-ring | 4 | |
| 07002-23634 | • O-ring | 1 | |
| 07002-61623 | • O-ring | 24 | |
| 07002-62034 | • O-ring | 1 | |
| 07002-62434 | • O-ring | 2 | |
| 14Y-22-23310 | • Seal Ring | 2 | |
| 14Y-22-37470 | • O-ring | 1 | |
| 232-15-19270 | • Seal Ring | 2 | |
| K02 | 14X-22-05011 | Service Kit, Steering | |
| 02896-61012 | • O-ring | 1 | |
| 02896-61018 | • O-ring | 2 | |
| 07000-72018 | • O-ring | 21 | |
| 07000-72065 | • O-ring | 1 | |
| 07000-72095 | • O-ring | 1 | |
| 07000-73022 | • O-ring | 17 | |
| 07000-73032 | • O-ring | 1 | |
| 07000-75180 | • O-ring | 2 | |
| 07000-75365 | • O-ring | 4 | |
| 07002-61623 | • O-ring | 24 | |
| 07002-62034 | • O-ring | 1 | |
| 07002-62434 | • O-ring | 2 | |
| 07002-63634 | • O-ring | 1 | |
| 14Y-22-23310 | • Seal Ring | 2 | |
| 14Y-22-37470 | • O-ring | 1 | |
| 232-15-19270 | • Seal Ring | 2 | |
| K03 | 14X-22-05020 | Service Kit, Steering Brake | |
| 07002-32434 | • O-ring | 2 | |
| 07002-33034 | • O-ring | 2 | |
| 07002-61623 | • O-ring | 1 | |
| 07002-61823 | • O-ring | 1 | |
| 113-15-29110 | • Seal, Oil | 2 | |
| K04 | 14X-15-05180 | Service Kit, Transmission | |
| 02896-61018 | • O-ring | 1 | |
| 07000-72015 | • O-ring | 13 | |
| 07000-72018 | • O-ring | 5 | |
| 07000-72021 | • O-ring | 5 | |
| 07000-73022 | • O-ring | 2 | |
| 07000-73025 | • O-ring | 2 | |
| 07000-73032 | • O-ring | 1 | |
| 07000-73035 | • O-ring | 5 | |
| 07000-73045 | • O-ring | 1 | |
| 07002-12434 | • O-ring | 1 | |
| 07002-61023 | • O-ring | 1 | |
| 07002-62434 | • O-ring | 3 | |
| 103-15-12820 | • Seal Ring | 2 | |
| 113-15-12870 | • Ring | 1 | |
| 124-15-41910 | • Seal Ring | 3 | |
| 124-15-41920 | • Seal Ring | 2 | |
| 14X-15-19210 | • Seal Ring | 1 | |
| 14X-15-29220 | • Seal Ring | 1 | |
| 14X-15-29230 | • Seal Ring | 1 | |
| 569-15-12860 | • Seal Ring | 2 | |
| 714-12-39230 | • Seal Ring | 2 | |
| 714-21-19810 | • Seal Ring | 2 | |
| K05 | 14X-15-05181 | Service Kit, Transmission | |
| 02896-61018 | • O-ring | 1 | |
| 07000-72015 | • O-ring | 13 | |
| 07000-72018 | • O-ring | 5 | |
| 07000-72021 | • O-ring | 5 | |
| 07000-73022 | • O-ring | 2 | |
| 07000-73025 | • O-ring | 2 | |
| 07000-73032 | • O-ring | 1 | |
| 07000-73035 | • O-ring | 5 | |
| 07000-73045 | • O-ring | 1 | |
| 07002-61023 | • O-ring | 1 | |
| 07002-62434 | • O-ring | 4 | |
| 103-15-12820 | • Seal Ring | 2 | |
| 113-15-12870 | • Ring | 1 | |
| 124-15-41910 | • Seal Ring | 3 | |
| 124-15-41920 | • Seal Ring | 2 | |
| 14X-15-19210 | • Seal Ring | 1 | |
| 14X-15-29220 | • Seal Ring | 1 | |
| 14X-15-29230 | • Seal Ring | 1 | |
| 569-15-12860 | • Seal Ring | 2 | |
| 714-12-39230 | • Seal Ring | 2 | |
| 714-21-19810 | • Seal Ring | 2 | |
| K06 | 14X-15-05190 | Service Kit, Transmission Control Valve | |
| 07000-71007 | • O-ring | 6 | |
| 07000-72015 | • O-ring | 24 | |
| 07000-73022 | • O-ring | 2 | |
| 07000-A2060 | • O-ring | 1 | |
| 07002-61023 | • O-ring | 2 | |
| 07002-61223 | • O-ring | 7 | |
| 07002-61423 | • O-ring | 5 | |
| 07002-61823 | • O-ring | 1 | |
| K07 | 14X-15-05210 | Service Kit, Transmission Main Relief Valve | |
| 07000-73030 | • O-ring | 5 | |
| 07002-61023 | • O-ring | 2 | |
| 07002-63034 | • O-ring | 4 | |
| K08 | 14X-13-05040 | Service Kit, Torque Converter | |
| 02896-61018 | • O-ring | 1 | |
| 07000-72070 | • O-ring | 1 | |
| 07000-72090 | • O-ring | 1 | |
| 07000-72100 | • O-ring | 1 | |
| 07000-72110 | • O-ring | 1 | |
| 07000-72130 | • O-ring | 1 | |
| 07000-73030 | • O-ring | 2 | |
| 07000-73032 | • O-ring | 2 | |
| 07000-73045 | • O-ring | 2 | |
| 07000-75065 | • O-ring | 1 | |
| 07000-75210 | • O-ring | 1 | |
| 07002-61023 | • O-ring | 7 | |
| 07002-62434 | • O-ring | 2 | |
| 07005-01212 | • Seal, Washer | 6 | |
| 07012-50095 | • Seal, Oil | 1 | |
| 426-13-42710 | • Seal Ring | 1 | |
| 567-15-12830 | • Ring | 2 | |
| 582-15-19240 | • Seal Ring | 2 | |
| K09 | 14X-32-05010 | Shoe Bolt and Nut Kit | |
| 154-32-71220 | • Nut | 30 | |
| 207-32-71620 | • Bolt | 30 | |
| K10 | 134-32-05010 | Shoe Bolt and Nut Kit | |
| 134-32-61221 | • Nut | 30 | |
| 154-32-21323 | • Bolt | 30 | |
| K11 | 13G-32-05010 | Shoe Bolt and Nut Kit | |
| 134-32-61221 | • Nut | 30 | |
| 13G-32-61210 | • Bolt | 30 | |
| K12 | 707-99-27120 | Service Kit, Lift Cylinder | |
| 02896-11015 | • O-ring | 3 | |
| 07000-12080 | • O-ring | 1 | |
| 07000-12085 | • O-ring | 1 | |
| 07000-13025 | • O-ring | 1 | |
| 07145-00055 | • Seal, Dust | 2 | |
| 707-35-52770 | • Ring, Back-up | 1 | |
| 707-39-85120 | • Ring, Wear | 2 | |
| 707-44-85150 | • Ring, Piston | 1 | |
| 707-51-60030 | • Packing, Rod | 1 | |
| 707-51-60650 | • Ring, Buffer | 1 | |
| 707-56-60740 | • Seal, Dust | 1 | |
| K13 | 707-99-26730 | Seal Kit, Hydraulic Cylinder | |
| 02896-61015 | • O-ring | 3 | |
| 07000-12090 | • O-ring | 1 | |
| 07000-B2085 | • O-ring | 1 | |
| 07145-00055 | • Seal, Dust | 2 | |
| 07156-00912 | • Ring, Wear | 2 | |
| 707-35-10860 | • Ring, Back-up | 1 | |
| 707-44-90150 | • Ring, Piston | 1 | |
| 707-51-60650 | • Ring, Buffer | 1 | |
| 707-51-60860 | • Packing, Rod | 1 | |
| 707-56-60740 | • Seal, Dust | 1 | |
| K14 | 707-99-27530 | Service Kit, Lift Cylinder | |
| 02896-11015 | • O-ring | 3 | |
| 07000-12085 | • O-ring | 1 | |
| 07000-12090 | • O-ring | 1 | |
| 07145-00055 | • Seal, Dust | 2 | |
| 07146-02086 | • Ring, Back-up | 1 | |
| 07156-00912 | • Ring, Wear | 2 | |
| 707-44-90150 | • Ring, Piston | 1 | |
| 707-51-60030 | • Packing, Rod | 1 | |
| 707-51-60650 | • Ring, Buffer | 1 | |
| 707-56-60740 | • Seal, Dust | 1 | |
| K15 | 707-99-43390 | Seal Kit, Hydraulic Cylinder | |
| 02896-61009 | • O-ring | 2 | |
| 07000-12125 | • O-ring | 1 | |
| 07000-B2120 | • O-ring | 1 | |
| 07145-00050 | • Seal, Dust | 2 | |
| 707-35-11210 | • Ring, Back-up | 1 | |
| 707-39-12520 | • Ring, Wear | 1 | |
| 707-44-12250 | • Ring, Piston | 1 | |
| 707-51-70650 | • Ring, Buffer | 1 | |
| 707-51-70860 | • Packing, Rod | 1 | |
| 707-56-70740 | • Seal, Dust | 1 | |
| K16 | 707-99-43320 | Service Kit, Tilt And Pitch Cylinder | |
| 02896-11009 | • O-ring | 2 | |
| 07000-12120 | • O-ring | 1 | |
| 07000-12125 | • O-ring | 1 | |
| 07145-00050 | • Seal, Dust | 2 | |
| 707-35-91510 | • Ring, Back-up | 1 | |
| 707-39-12520 | • Ring, Wear | 1 | |
| 707-44-12250 | • Ring, Piston | 1 | |
| 707-51-70030 | • Packing, Rod | 1 | |
| 707-51-70650 | • Ring, Buffer | 1 | |
| 707-56-70740 | • Seal, Dust | 1 | |
| K17 | 707-99-43740 | Seal Kit, Hydraulic Cylinder | |
| 02896-61009 | • O-ring | 2 | |
| 07000-12130 | • O-ring | 1 | |
| 07000-13050 | • O-ring | 4 | |
| 07000-B2125 | • O-ring | 1 | |
| 07156-01315 | • Ring, Wear | 1 | |
| 707-35-11260 | • Ring, Back-up | 1 | |
| 707-44-13150 | • Ring, Piston | 1 | |
| 707-51-70650 | • Ring, Buffer | 1 | |
| 707-51-70860 | • Packing, Rod | 1 | |
| 707-56-70740 | • Seal, Dust | 1 | |
| K18 | 707-99-43730 | Service Kit, Tilt Cylinder | |
| 02896-11009 | • O-ring | 2 | |
| 07000-12125 | • O-ring | 1 | |
| 07000-12130 | • O-ring | 1 | |
| 07000-13050 | • O-ring | 4 | |
| 07146-02126 | • Ring, Back-up | 1 | |
| 07156-01315 | • Ring, Wear | 1 | |
| 707-44-13150 | • Ring, Piston | 1 | |
| 707-51-70030 | • Packing, Rod | 1 | |
| 707-51-70650 | • Ring, Buffer | 1 | |
| 707-56-70740 | • Seal, Dust | 1 | |
| K19 | 707-99-36720 | Seal Kit, Hydraulic Cylinder | |
| 02896-61012 | • O-ring | 3 | |
| 07000-12110 | • O-ring | 1 | |
| 07000-13050 | • O-ring | 4 | |
| 07000-B2105 | • O-ring | 1 | |
| 07156-01112 | • Ring, Wear | 2 | |
| 707-35-11060 | • Ring, Back-up | 1 | |
| 707-44-11150 | • Ring, Piston | 1 | |
| 707-51-65650 | • Ring, Buffer | 1 | |
| 707-51-65860 | • Packing, Rod | 1 | |
| 707-56-65740 | • Seal, Dust | 1 | |
| K20 | 707-99-36680 | Service Kit, Angle Cylinder | |
| 02896-11012 | • O-ring | 4 | |
| 07000-12105 | • O-ring | 1 | |
| 07000-12110 | • O-ring | 1 | |
| 07000-13050 | • O-ring | 4 | |
| 07146-02106 | • Ring, Back-up | 1 | |
| 07156-01112 | • Ring, Wear | 2 | |
| 707-44-11150 | • Ring, Piston | 1 | |
| 707-51-65030 | • Packing, Rod | 1 | |
| 707-51-65650 | • Ring, Buffer | 1 | |
| 707-56-65740 | • Seal, Dust | 1 |
Safety First: Relieve all hydraulic pressure and secure the cylinder before disassembly.
Clean Environment: Perform disassembly and assembly in a clean, dust-free area to prevent contamination.
Inspection: Check the cylinder bore, rod, and gland for scratches, pitting, or wear. Replace components if damage exceeds tolerances.
Seal Installation: Lubricate seals lightly with clean hydraulic fluid before installation. Avoid twisting or over-stretching seals.
Alignment: Ensure proper alignment during reassembly to prevent seal pinch or uneven wear.
Pressure Testing: After installation, conduct a gradual pressure test to verify leak-free performance before returning to full operation.
Q1: Which Komatsu dozer models use the 707-99-43740 heavy-duty blade tilt cylinder seal kit?
A: This heavy-duty seal kit is designed for specific Komatsu bulldozer blade tilt cylinders requiring OEM part number 707-99-43740. Please verify compatibility with your dozer model and cylinder part number before ordering.
Q2: What makes this a "heavy-duty" blade tilt seal kit?
A: The heavy-duty kit features advanced polyurethane seals and high-grade rubber compounds engineered to withstand extreme hydraulic pressures, shock loads, abrasion, and harsh dozing conditions for extended service life.
Q3: Is this an OEM or aftermarket seal kit?
A: It is an OEM-grade heavy-duty replacement kit, manufactured to meet or exceed original Komatsu quality standards for sealing performance, durability, and precise fit.
Q4: What is included in the COGENG 707-99-43740 seal kit?
A: The kit includes all necessary rod seals, piston seals, wipers, O-rings, and backup rings for a complete blade tilt cylinder rebuild – no missing components.
Q5: How do I purchase the COGENG 707-99-43740 heavy-duty blade tilt cylinder seal kit?
A: Contact us with your Komatsu dozer model and cylinder details for fitment verification, then order directly through our website or sales team for fast shipping.
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