07011-00045 0701100045 HNBR PU FKM Carbon Filled PTFE Multi-Material Composite Oil Seal Kit for Bulldozer Transmission Lock-up Clutch Valve Complete Overhaul Servicing S6D140E-2A-6

1. Quick Details of  seal 07011-00045:

2. 07011-00045  parts on group :

3. 07011-00045  picture:

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5. FAQ

Q: Which Komatsu medium and heavy crawler bulldozer models can this 07011-00045 oil seal kit match, and what complete set of sealing spare parts are fully packed inside this overhaul service package?
A: This dedicated lock-up clutch valve oil seal repair kit is OEM customized for Komatsu D65EX-16, D85EX-18, D155AX-8 crawler bulldozers, exclusively matched with the built-in transmission lock-up clutch control valve. This core valve engages the direct lock-up clutch under high-speed flat traveling conditions to eliminate power loss from torque converter slippage, lower fuel consumption during long-distance transfer, and automatically disengage lock-up during low-speed heavy pushing and uphill climbing to retain torque amplification capacity. The kit contains all full-set sealing components required for one complete valve disassembly and overhaul, including double-lip HNBR lock-up shuttle spool dynamic oil seals, dual balanced lock-up pressure feedback piston pressure seals, trapezoid rounded PU lock-up engagement surge buffer rings, carbon-filled PTFE medium-gap anti-extrusion backup rings, heat-resistant medium thick FKM static O-rings, medium-duty double-layer transmission oil isolation dust wiper and thickened anti-corrosion metal flat gaskets. All sealing accessories are sorted and sealed into independent labeled plastic bags classified by assembly positions, so maintenance technicians do not need to source scattered lock-up clutch valve seals from multiple suppliers, greatly cutting equipment downtime on highway long-distance transfer, open-pit mine stripping and large-scale land leveling construction sites.

Q: What exclusive performance advantages does the four-material composite formula bring to bulldozer transmission lock-up clutch valve sealing compared with ordinary single NBR oil seal kits?
A: The bulldozer transmission lock-up clutch control valve switches between low-pressure standby state and high-pressure lock-up state repeatedly all day long, enduring periodic sharp pressure surges triggered by lock-up engagement and release, long-term immersion in high-temperature transmission oil mixed with metal friction debris, and year-round erosion of water vapor and fine sludge penetrating into the closed transmission valve cavity. HNBR main lock-up spool and piston seals possess far superior low-temperature flexibility and anti-switching alternating pressure hydraulic oil aging performance compared with ordinary NBR rubber; they will not harden, crack or lose uniform radial pre-tightening elasticity under freezing plateau winter construction with frequent cold-start high-speed lock-up traveling operations. Trapezoid rounded PU buffer rings absorb instantaneous high-pressure surge spikes generated by lock-up clutch rapid combination, avoiding one-way cyclic fatigue cracking and unilateral micro eccentric abrasion damage to double-lip spool sealing lips after millions of lock-up on-off switching cycles. FKM thick static O-rings maintain consistent long-term static sealing tightness under prolonged high-temperature transmission oil circulation during uninterrupted all-day heavy pushing work. Carbon-filled PTFE medium-gap backup rings deliver balanced unilateral lock-up wear resistance and medium-clearance anti-extrusion capacity, effectively preventing the main spool seal from being extruded into moderate clearance gaps between lock-up shuttle spool and valve body under lock-up peak pressure. The four materials build a lock-up on-off switching anti-slippage energy-saving multi-layer interlocking sealing protection system, raising the overall service lifespan of this oil seal kit by over 56% compared with traditional single-rubber oil seal kits.

Q: What clear color and structural visual differences allow maintenance technicians to quickly identify each precision component inside this transmission lock-up clutch valve oil seal kit?
A: HNBR lock-up shuttle spool and balance piston main seals are matte jet black with asymmetrical double-lip unidirectional dynamic sealing structure, the contact lip surface adopts nano mirror precision polishing without micro burrs or frequent lock-up switching cyclic abrasion scratches. Trapezoid rounded PU lock-up engagement pressure buffer rings are pale apricot yellow with exclusive trapezoid rounded shock absorption outline, which can be clearly distinguished from rectangular rounded, wide curved oval and narrow curved oval PU buffer rings used on speed shift valves, auxiliary pressure compensation valves and priority flow valves. FKM medium thick static O-rings are dark coffee brown with thick uniform circular cross-section, no shrinkage or permanent micro deformation after long-term lock-up alternating high-low pressure high-temperature oil soaking storage. Carbon-filled PTFE medium-gap anti-extrusion rings are off-white with evenly scattered tiny black carbon particles spread across the flat surface, easy to separate from light gray graphite-infused PTFE rings applied to narrow-gap miniature pilot valve assemblies. The medium-duty double-layer dust wiper ring is medium-thick black with two layers of scraping lips; the outer layer intercepts large metal friction debris mixed in transmission oil, and the inner fine lip blocks tiny abrasive sludge particles from entering the unidirectional lock-up spool gap. Each accessory is printed with clear lock-up clutch control valve matching dimension marks on the surface for rapid sorting and matching during on-site transmission valve assembly.

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