Upgrading the hydraulic pump on a Harbor Freight towable backhoe trencher

How to upgrade the hydraulic pump on a Harbor Freight towable backhoe trencher. Went from stock 2.7cc pump to a 4.1cc Salami pump.

====== Pump: Salami Hydraulic Gear Pump ======
Model #: 1.6PB4.1D-R080S0
Alternative model #: 1.5PE4.1D-R80S0

(The 1.6 was superseded by 1.5. Both have identical mounts and port locations, but there are some cosmetic differences.)

Purchased from:

====== Outlet hose adapter: 6MB-6FP ======
Purchased from:

Inlet hose adapter: 8MB-8FP
Purchased from:

Checkout my backhoe playlist for more videos on modifying and using this machine:

[davidaboleysr]

Today is 3/2/2024. I just wanted to thank you for this video. All your links worked and the shipping was with in a week. The pricing went up. The pump including tax and shipping is $235.00 and fit/worked perfect. The adapters shipped fast and fit perfectly for about $25.00 total. Again thanks for this video spot on!

[kelleysimonds]

Excellent video and, thank you for NO MUSIC!!

[LarsDcCase]

Great video. And yes, many thanks for no irritating annoying background music. 😀

[bobbymiller]

Thanks for leaving the pump and couplings on here with the place you got them from. I ordered the pump and couplers and it’s a big difference to the machine

[tonysimmons]

This is the epitome of an excellent tutorial video. Thank you for taking the time to share!

[Teshia]

Thank you! When I get mine I'm gonna skip the stock pump all together and just install the upgrade. This was an extremely useful video.

[RavensRidgeNC]

Appreciate the side-by-side! Just ordered one yesterday and had seen folks have had some issue with the speed, but feeling much more confident after viewing your upgrade, thanks!

[jeffreyradley]

did my pump upgrade today, big diff., before I was waiting for the bucket to uncurl, now it's much faster, thanks for the

[cha-ka]

AWESOME VIDEO! Perfectly detailed for the replacement of the pump and the side by side was sweet so we can tell if it's worth the change. Thank you so much.

[johnstoffel]

Those O ring boss fittings are tightened all the way down. The O Rings are sized to compress into the recess.

[frankish]

Nice upgrade! For future reference, you should only need about two complete wraps of teflon tape on a tapered thread for it to seal up. too much rape can get squeezed into the pipe where it can break off and damage components.

[PreparingforAmos.]

THANK you! I have ordered the pump and hose adapter for my HF backhoe. Great help!

[idahopotato]

At 6:34 not only new tape but you don't want to turn the threads counter clockwise after tightening down. A paste is much better here than tape. Rectorseal is good one. Great video

[mercedesvan-doors]

Quick tip, when working on hydraulic equipment and you are disconnecting hoses hook up a shop vac to the hydraulic fill and the vacuum will stop or certainly slow the oil loss.

[hoosierfatha]

Great Job, nice mod on the coupling too!!! Pro Tip: (lol) Try to get out of the Habit of using Teflon tape on Hydraulic systems use a hardening hydraulic sealant. Tape will act a wick, and-it will eventually Frey, clogging your components causing them not work... Otherwise top notch video...

[billdog]

I built my own backhoe. Ordered this pump and fittings from this video. It's almost done, I hope it works. Mine is heavier than the harbor freight unit 🙈

[ryandavis]

That's a great idea I have a mosquito problem here as well and you wearing that head net just made me want to get one, I don't like wearing long sleeve shirts because it's hot as the devil's ass here but it might be (better than) spraying myself with all that deet

[wiggybends]

Where you pick up the mechanical skills? Bravo - nice job

[dalemasyk]

girl, you just answer all of my prairs about the hydric-pump and beyond...thank you for that awsome tips n show WELL DONE...love you for that hehehe

[davidanderson]

Nice vido, one thing you want to be careful of with the teflon tape is not wrapping over the Ned of thread on adapter nippel, as it will cut tape loose and possibly plug up valve, great job on improving your equipment,