195-15-39260 1951539260 RING,SEAL OF D475A-1 D475ASD-5E0

1. Quick Details of  seal 195-15-39260:

2. 195-15-39260 parts on group :

3.  195-15-39260 picture:

4. Service part number :

5. FAQ

Q: Which large mining bulldozer model is equipped with this piston seal ring 195-15-39260, and what dual-direction hydraulic isolation sealing performance can this three-piece composite piston seal deliver inside the main transmission clutch hydraulic piston chamber?
A: This genuine OEM piston seal ring marked 195-15-39260 is exclusively matched for Komatsu D155AX-8 large open-pit mining bulldozers, mounted on the main clutch pressure control piston inside the transmission hydraulic cavity. The clutch piston bears continuous bidirectional reciprocating strokes under long-term stable high hydraulic pressure during extra-large open-pit mine massive ore pushing, steep mountain rock road base trimming and large-volume construction waste soil stripping heavy-duty operations. It withstands frequent instantaneous pressure spikes triggered by uneven hard rock ground violent jolts, long-term mixed erosion of high-temperature anti-wear transmission clutch hydraulic oil and tiny metal clutch friction plate grinding debris, plus year-round outdoor drastic cold-hot temperature alternations between high-altitude freezing winter mining zones and non-stop full-load high-temperature summer continuous operation. This three-in-one integrated composite piston seal assembly consists of bronze powder filled PTFE main sliding seal ring, double-sided rigid PA66 anti-extrusion back-up rings and oil-resistant HNBR elastic energizer, realizing stable bidirectional fluid isolation inside the transmission clutch cavity. It effectively blocks high-pressure hydraulic oil from cross-flowing on both sides of the piston to avoid clutch slipping, delayed gear engagement and bulldozer walking traction loss; the paired rigid back-up rings prevent the soft PTFE sealing main body from being squeezed into tiny piston groove clearances under instantaneous peak pressure impact, while the built-in HNBR energizer delivers sustained radial pre-tightening force to automatically compensate micro abrasion generated by millions of long-term reciprocating strokes of the PTFE ring. All components adopt exclusive customized large-size dimensional standards and cannot be mixed and matched with piston seals of medium or mini bulldozer models, suitable for full transmission clutch disassembly maintenance at extra-large open-pit bulldozer dedicated repair yards and comprehensive heavy construction machinery one-stop service stations, greatly cutting unexpected long-term equipment downtime caused by internal clutch cross oil leakage.

Q: What unique three-material composite sealing comprehensive advantages does this bronze powder filled PTFE piston seal ring have compared with single PU or NBR integral rubber piston seals sold by aftermarket spare parts dealers for D155AX-8 bulldozer transmission clutches?
A: The transmission clutch piston of D155AX-8 large mining bulldozers reciprocates millions of times every month under sustained 32–40Mpa high hydraulic pressure, fully immersed in high-temperature anti-wear clutch hydraulic oil mixed with hard metal fine grinding particles all year round, and exposed to cold-hot alternating complex working environments with huge temperature difference fluctuations. Bronze powder reinforced modified PTFE main sealing body owns ultra-low friction coefficient, excellent compressive creep resistance and outstanding anti-hard particle scratch performance that ordinary single NBR or PU rubber cannot reach; evenly distributed bronze powder inside PTFE forms a permanent self-lubricating wear-resistant protective layer during reciprocating sliding movement, thoroughly eliminating dry friction scratch damage between the seal outer circle and cylinder inner wall, and will not swell, soften or generate irreversible permanent compression set deformation after long-term continuous soaking in clutch hydraulic oil above 135℃. Double-sided high-rigidity modified PA66 nylon anti-extrusion back-up rings possess ultra-high compressive hardness and impact resistance, which can withstand repeated instantaneous peak pressure impact without bending, cracking or permanent distortion, fundamentally solving the core extrusion failure defect of single integral rubber seals under long-duration heavy pressure loads. The HNBR elastic energizer maintains stable elastic tightening tension at ultra-low ambient temperature down to -43℃, effectively avoiding seal loosening and internal cross oil leakage caused by ordinary rubber hardening and elasticity loss in high-altitude alpine winter mine construction sites. This targeted matched three-material composite layered protection structure extends the overall effective service life of the piston seal by more than 98% compared with ordinary single rubber piston seals, and significantly reduces repeated maintenance labor hours and spare parts repeated procurement comprehensive costs for extra-large open-pit mine fleet operators.

Q: How can on-site professional large heavy bulldozer maintenance technicians rapidly distinguish each independent component of this 195-15-39260 piston seal ring set via exclusive color difference, surface texture and structural shape feature differences?
A: The bronze powder filled PTFE main piston sealing ring is uniform dark bronze gray matte solid split ring with fine metallic bronze grain matte texture on the surface, smooth dry sliding surface without sticky rubber touch feeling, and adopts wide symmetrical rectangular cross-section specially customized for bidirectional large clutch piston high-pressure hydraulic sealing demands. Two independent high-rigidity PA66 nylon anti-extrusion back-up rings are pale ivory hard thin split rings with obvious rigid plastic compact texture, thicker and wider than back-up rings of medium bulldozer seals, separately installed on both left and right sides of the PTFE main ring to block extrusion gaps. The matched HNBR elastic energizer O-ring is matte black thick elastic circular rubber part with soft elastic touch, embedded into the wide inner circular reserved groove of the PTFE main ring to provide continuous uniform radial tightening tension. Every single independent sealing component is carved with miniature micro laser engraved large-size dimension identification codes corresponding to D155AX-8 clutch piston groove standard parameters, supporting one-to-one rapid sorting and accurate size matching during full transmission clutch disassembly overhaul work. Inferior single integral rubber replacement seals have no independent hard anti-extrusion back-up rings, the surface is covered with thick residual mold release agent showing obvious sticky texture, integrated single black rubber one-piece structure without split auxiliary back-up rings, and lack clear laser size marking identification codes on each independent accessory.

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