Fuel Primer Pump 6657734 for Bobcat S100 S130 S150 S160 S175 S220 S250 S300 S330 S550 S570 S590 S630
This fuel primer pump is engineered as a direct replacement for the Bobcat S100 S130 S150 S160 S175 S220 S250 S300 S330 S550 S570 S590 S630. Manufactured to meet or exceed OEM specifications, it delivers reliable performance in demanding conditions. Each unit is tested for fuel flow, pressure rating, and durability before leaving the factory to ensure consistent quality across every order.
Vehicle Compatibility
| Application | Details |
|---|---|
| Bobcat S100 S130 S150 S160 S175 S220 S250 S300 S330 S550 S570 S590 S630 Part Name:Fuel Primer Bulb, Primer Hand Pump, Fuel Primer Pump, Rubber Fuel Primer Bulb Replace Part Number:6657734 Application:Fit for | See product specifications |
| Bobcat Skid Steer Loader:S100, S130, S150, S160, S175, S185, S205, S220, S250, S300, S330, S450, S510, S530, S550, S570, S590, S630, S650, S750, S770, S850Fit for | See product specifications |
| Bobcat Compact Track Loader:T110, T140, T180, T190, T200, T250, T300, T320, T550, T590, T630, T650, T750, T770, T870Fit for | See product specifications |
| Bobcat All | Wheel Steer Loader:A220, A300, A770Fit for |
| Bobcat Backhoe Loader:B300, B300, BL570, BL570, BL370, BL370 | See product specifications |
Replaces OEM Part Numbers
6657734 • Application • Bobcat • Steer • Loader • S850Fit • Compact • Track • T870Fit • All-Wheel • A770Fit • Backhoe
Signs You Need a Replacement
If your equipment is showing any of these symptoms, the fuel pump may be the cause:
- Primer bulb stays flat — The internal check valves are worn and can’t pull fuel from the tank. Replace the primer pump to restore fuel flow.
- Air bubbles in the fuel line — A worn primer pump allows air to enter the system through the shaft seal or housing crack.
- Engine hard to start after filter change — After replacing the fuel filter, the system needs to be primed. If the primer bulb doesn’t firm up, the pump is likely faulty.
Bleeding the System
After installing the new primer pump, pump the bulb until it becomes firm. Crack open the fuel line at the engine end and pump until fuel flows out bubble-free. Tighten the fitting and pump the bulb a few more times to confirm it stays firm. Start the engine and let it idle for a minute. If the primer bulb goes soft after the engine stops, check for air leaks at all connections.
Frequently Asked Questions
Will this fit my Bobcat S100?
Yes. This part is designed to fit the Bobcat S100, S130, S150, S160 among other models listed in the compatibility table above. Verify your specific model and engine code before ordering to ensure the correct fit.
Can I cross-reference 6657734 with Application?
Yes. Both 6657734 and Application are interchangeable OEM numbers for this part. They refer to the same component with the same specifications, just different part number revisions.
How do I check if my engine code (BL570, BL370) matches?
The engine code is stamped on a metal tag attached to the engine block, usually near the timing belt cover or on the cylinder head. Compare the code you find with the list above. Engine codes are 3 to 6 characters long.
How do I bleed the fuel system after replacing the primer pump?
Pump the primer bulb until it becomes firm. Then crack open the fuel line at the engine end and pump until fuel flows out bubble-free. Tighten the fitting, pump the bulb a few more times to confirm pressure holds, then start the engine.
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