Part Number: 705-21-32050
PTC Reference: PTE-705-21-32050
Genuine aftermarket Komatsu Trasmission Pump (Part No: 705-21-32050). OEM-specification replacement compatible with PC200, PC300, PC400, PC600 Series Excavators. Stocked in Mumbai for same-day dispatch across India. WhatsApp +91-98210-37990 for pricing and availability.
What hydraulic parts do: The hydraulic system is the muscle of any excavator or bulldozer — it powers swing, lift, stick, bucket curl, travel, and blade operations. Key components include main pumps, swing motors, travel motors, control valves, solenoid valves, cylinders, hydraulic filters, and O-ring seal kits. A single failed component can ground the entire machine.
Failure symptoms to watch for: Slow or jerky boom/stick/bucket movement, machine drifting at rest, hot hydraulic oil (above 90°C), milky or foamy oil indicating water contamination, and high-pitched whining from the pump are all early warning signs. Ignoring these leads to catastrophic pump or motor failure, often 5–10× more expensive than proactive replacement.
Maintenance guidance: Change hydraulic oil every 2,000–4,000 hours depending on operating conditions. Replace hydraulic filters every 500–1,000 hours. Check and change cylinder seals whenever a rod shows scoring or weeping. In Indian construction sites with high dust, inspect breather caps monthly.
Why part quality matters: Hydraulic components run at 300–450 bar. Substandard seals or improperly machined pump plates cause bypass loss, reducing dig force and fuel efficiency. PTC sources hydraulic components from verified manufacturers and cross-checks OEM part numbers before dispatch.
| Brand | Komatsu |
| Part Number | 705-21-32050 |
| Category | Hydraulic Parts |
| Compatible Models | D85A 21, D85A 21B, D85C 21, D85E 21, D85P 21, S6D125E 2 |
| Equipment Type | Hydraulic Excavator |
| Availability | ✓ In Stock |
| Dispatch | Same day from Mumbai |
Why PTC? Est. 1956 · 70+ years expertise · 51,000+ parts in stock · Export to UAE, Africa, SE Asia
The compatible machine models are listed in the product information table above. Hydraulic components are often model-specific — a pump or motor designed for a PC300-7 may differ in displacement, port configuration, or spline count from a PC300-8 version. Always verify your machine's serial number.
Symptoms include: slow or uneven implement movement, machine drifting at rest (cylinder internal bypass), hot hydraulic oil, high-pitched whining from the pump, and excessive case drain flow. Measure pump output pressure and flow against specification using a flowmeter — bypass rate above 15–20% indicates internal wear requiring pump replacement.
Use the hydraulic oil grade specified in your machine's operation and maintenance manual — typically ISO VG 46 or VG 68 depending on climate. Never mix hydraulic oil types or brands. In India's warm climate, VG 46 is suitable for most regions year-round; VG 68 may be used in extreme heat conditions.
We dispatch from our Mumbai warehouse within 1–2 business days. Major cities (Delhi, Bangalore, Chennai, Kolkata, Hyderabad, Pune) typically receive orders in 3–4 days. Northeast India and remote locations may take 5–7 days. Contact us on WhatsApp for urgent requirements — we can arrange same-day or next-day courier for critical breakdowns.
PTC provides a replacement guarantee on manufacturing defects for all hydraulic components. Warranty claims require the part to be returned for inspection. Warranty does not cover damage caused by contaminated hydraulic oil, incorrect installation, or operation outside specified pressure limits.