Mini and compact excavators actually carry two separate hydraulic pumps: an open-circuit main pump for the boom, arm and bucket, and a closed-circuit Series 90 pump dedicated to the travel (track drive) function. Sauer Danfoss's Series 90 — available in displacements from 55cc to 250cc as 90R030 through 90R250 — is one of the most widely used closed-circuit pumps in this segment worldwide, prized for its compact size and high power density.
Main Pump vs Travel Pump — Know Which One You Need
Not sure which one applies? WhatsApp us a short video of the machine's behaviour and we'll help diagnose before you order.
Series 90 Range for Mini & Compact Excavators
| Excavator Class | Series 90 Model | Displacement | Typical Weight Class |
|---|---|---|---|
| Sub-1 to 2 Tonne | 90R055 / 90R042 | 42-55 cc/rev | 1.5-2.5 tonne |
| 3 to 5 Tonne | 90R075 / 90R100 | 75-100 cc/rev | 3-5 tonne |
| 5 to 8 Tonne | 90R130 | 130 cc/rev | 5-8 tonne |
Displacement varies by machine — confirm your exact model code (stamped on the pump body) before ordering. WhatsApp us the code for a precise match.
What Our Series 90 Refurbishment Covers
Measured against Sauer Danfoss tolerance; replaced if wear exceeds spec on the swashplate contact face.
The integral charge pump — responsible for system replenishing and control oil flow — is inspected and rebuilt.
The proportional control (mechanical, hydraulic or electric depending on variant) is tested for smooth, accurate response.
Replaced as standard — the most common source of external leaks on a closed-circuit pump.
Tested in a closed-loop rig to confirm charge pressure and drive output before the unit ships.
Why Mini Excavator Owners Choose PumpGrid
Import Lead Times Avoided
Genuine Series 90 pumps for mini excavators in India are often special-order imports with multi-week lead times. PumpGrid keeps refurbished units ready to move.
Lower Cost for a Small-Fleet-Friendly Machine
Mini excavators are often owned by smaller contractors and individual operators where a new-pump import cost can be disproportionate to the machine's value. Refurbishment keeps the economics sensible.
Correct Diagnosis Before You Spend
Because mini excavators have two separate pumps, we help you confirm — via WhatsApp — whether it's actually the travel pump before you buy, so you're not replacing the wrong part.
3-Month Warranty on Every Unit
Confirmed in writing at the quote stage, with replacement (not repair) if a refurbishment defect appears within the warranty period.
Signs Your Series 90 Travel Pump Needs Attention
If digging is normal but travel is weak, it's almost certainly the Series 90 pump or its matched travel motor — WhatsApp us the machine model to confirm.