low power on 9030b case excavator

thepumpguysc · Mar 22, 2019

WOW.. u got some big ones.!!!
The regulator comes apart thru the bottom..
..theres a tool that pushes thru & expands & u pull the "spring-clip" out.
What u did is> increased the pressure to advance the internal pump timing..

treecutter · Mar 22, 2019

but without increasing the internal pump pressure i have no power. the loss of engine power hapened all at once and after i tried everything else with no luck the fuel pressure regulator was the next step and after changing the tension the motor has lots of power. I am wondering if i can buy a new spring or replace the pressure regulator and check the pressure at banjo bolt i would not over fuel. does anyone know the pressure i should have at different rpms treecutter

thepumpguysc · Mar 22, 2019

U can not buy a spring..
The pres. regul. comes as an assembly..
U have to have the pump # inorder to get the specs..
The # is on the "flat spot" on the pump housing.. where the housing meets the "head".. {aluminum to steel}
U CAN back off the tension by knocking the piston w/ a punch & hammer from the bottom towards the top.

treecutter · Mar 22, 2019

I found a new regulator on line for $60 .I wonder if it would solve my pressure problem without doing a pressure test on pump. treecutter

thepumpguysc · Mar 22, 2019

raising the internal pressure could seize the pump or blow out the front seal..
I coulda told u how to turn the fuel up..
Like I said, all u did was advance the internal timing.. the fuel is injecting sooner.. just like advancing the distributor on a gas engine.

thepumpguysc · Mar 22, 2019

The regulators come.."not adjusted" & will run like sh!t w/o adjusting it..

thepumpguysc · Mar 22, 2019

Unless u can give us/me a PUMP #... AND ...figure out a way to take a pressure reading..
Lets face it.. u screwed-up..
.. the pressure reading is taken BEFORE the overflow valve.{return connector/ banjo bolt}

treecutter · Mar 22, 2019

my pump has 1L 137 and below 55and looks like a 4 . Are you saying that all i'm doing by rasing internal pressure is advancing the timing? I was under the impression that the govenor wouldent work with low pressure.I would have to have a longer banjo bolt to add a test guage.do i increase the fuel to pump by adjusting the bolt on top cover. treecutter

thepumpguysc · Mar 22, 2019

On TOP of the cover is a hi idle screw, a low idle screw..
On the BACK of the top cover is the fuel screw.. 12-14mm lock screw w/a screwdriver slot adjustment.
U can turn the screw "in">> NO MORE THAN 1/4 turn.. anything more & you'll melt the engine.!!!

treecutter · Mar 23, 2019

thanks for your support. I plan on removing pressure regulator and setting to low pressure, then reinstalling it with a psi gauge before the banjo bolt.and adjusting to the correct pressure.i havent yet found out what psi i should have in pump at high speed. i read somewhere 15 psi .I don't want to blow seals. I checked the fuel delivery pump and it has almost 7 psi to injector pump. treecutter

thepumpguysc · Mar 23, 2019

7 psi is good TO the inj. pump..
I need some numbers I can work with, inorder to get u the "internal" transfer pump pressures..15 is wrong.

treecutter · Mar 23, 2019

treecutter · Mar 23, 2019

This is the numbers on my pump. do i set pressure at idle or full throttle. treecutter

thepumpguysc · Mar 23, 2019

ON THE SIDE of the pump

thepumpguysc · Mar 23, 2019

On the flat on the aluminum hsg.. just before the steel head.

treecutter · Mar 23, 2019

The numbers were down on side. the only way was to stick my camera in and take a picture. i hope you can make it out. treecutter

thepumpguysc · Mar 23, 2019

PERFECT.. I'll be in touch

thepumpguysc · Mar 23, 2019

It'll be Monday before I can get the actual spec.. my home program isn't working.
but I can tell u that the pressure is set at wide open throttle at "X" rpm.. its given in "bars"..but easily converted.

treecutter · Mar 23, 2019

thats great. i will have to get a hook up to test by the banjo bolt. my banjo bolt has a screen in it and a small orfice out the side.it has a 303s and a 55 on the top. i could buy one with a hole tapped in top but it may not have the proper restriction,or maybe that wouldn't matter.I might be able to drill a hole and tap my bolt out but there must be an easier way. treecutter

thepumpguysc · Mar 23, 2019

The restriction DOES matter, that's your overflow valve & is important.. don't drill it..
We have a "tool" that the overflow valve screws into the top of & the pressure is taken BEFORE the valve.

low power on 9030b case excavator

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