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Cat 303cr mini excavator troubleshoot

I have a cat 303 cr and under hydraulic load it's trying to stall the engine?? Hydraulic pump going out or??...any suggestions?

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Posted on Jan 02, 2017

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SOURCE: 330 excavator with a c9 cat engine, heavy SMOKE

At the time you made all the above repairs, did you replace the "throw away" turbo charger? The turbo charger commonly sucks oil, and it is not repairable.

Run it without the inner & outer air cleaner. If it isn't the turbo, run the injector cut out test. If the injectors are ok, then you need to replace the injection system hydraulic pump, which is also unrepairable.

Posted on Apr 23, 2010

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2 Answers

Code p2712 after prier owner added brake fluid to transmission


The transmission fluid must be the specified type and make otherwise your gear box may fail.
Brake fluid is for brakes, transmission fluid is for gearboxes!

Definition of check engine code P2712:
Generic (Common for all car manufacturers):
Hydraulic Power Unit Leakage

Feb 27, 2018 | Cars & Trucks

2 Answers

I have a 345 OMC mustang skid steer. deutz 2cyl diesel engine it is leaking hyd oil from under bottom of machine not on rims or tires what could be leaking


Not a CAR...

Skid Steers... like yours: we call bob-cats here (USA)...

EASIEST & most common are cracked & loose hoses.

You have a serious hydraulic pump & piston system on all the configurations I've been able to pull.

Any damaged SEAL EVERYWHERE in that circuit
is going to be hydraulic oil...

Crank-case, transmission case... (etc.).

What you are going to have to do is pressure clean the wettest areas... wipe them down... and make your EYES & BRAIN take a look around for the most severe leak...

Fix it... and repeat the process until you
have things nice, tight and dry...

Carnac the Magnificent

Jan 21, 2017 | Cars & Trucks

1 Answer

Having some sort of a fan issue going on...


my guess is you dont know the radiator fan rules.
its different on each of 3 engines
I have the 3.7L in same car, same year, but is WK yours is XK
the larger passenger compartment with bigger engine.
i have the FSM (SM) factory service manual.
so will post the words out of it , its free to read, posted 300+ time here. and no more posts, im going dark....lol
chapter 7 covers both engine.
5.7:
the 5.7 uses hydraulic fan (not electric motors but uses hydraluic motors, off ps pump)
so is the PS, assist ok and no noises from it.?
first the quotes in cht.7
5.7L ENGINE The 5.7L hydraulic cooling fan is integral
to the fan shroud and is located between the radiator
and the engine.
The power steering pump supplies the hydraulic fluid
and pressure to rotate the cooling fan blade, while the
electrical part of the fan is controlled by the FCM.
The hydraulic fan drive (motor) consists of the three
major following components:
² Steering flow control valve
² Fan control valve
² Two stage G-rotor hydraulic drive
The hydraulic fan and drive is not serviceable. Therefore
any failure of the fan blade, hydraulic fan drive or
fan shroud requires replacement of the fan module
because the fan blade and hydraulic fan drive are
matched and balanced as a system and servicing
either separately would disrupt this balance.
end quote now the rules
HYDRAULIC FAN STRATEGY
The hydraulic radiator cooling fan is controlled by the FCM. A PWM (Pulse With Modulated) signal from the JTEC
controls the fan speed. There are four inputs to the FCM that determine what speed percentage of fan is required
by the vehicle. These inputs are:
² Engine Coolant Temperature
² Transmission Oil Temperature
² A/C System Pressure
By monitoring these three parameters, the FCM can determine if cooling airflow is required. If airflow is required, the
FCM will slowly ramp up (speed up) the fan speed until the parameter(s) are under control. Once the temperature
HYDRAULIC FAN FLUID FLOW CIRCUIT
1 - POWER STEERING RESERVOIR
2 - POWER STEERING PUMP
3 - HYDRAULIC FAN DRIVE ASSEMBLY
4 - FAN BLADE
5 - HYDRAULIC FAN CONTROL SOLENOID
6 - POWER STEERING OIL COOLER
7 - STEERING GEAR
WK ENGINE 7 - 35
or pressure is reduced to within operating parameters the fan will ramp up, ramp down, or hold its speed to maintain
the temperature / pressure requirements.
NOTE: Even if the FCM is not requesting fan on operation the fan blade will usually spin between 100 and
500 RPM when the vehicle is at idle. This is due to a controlled minimum oil flow requirement through the
fan drive motor.

so is it still broke, or just a learning curve
its not simple at all.
in fact all 2005 up GC are complex fan controls
every one,
using tables to decide need, and speed.
on all modern jeeps.

Apr 10, 2016 | 2010 Jeep Commander 5.7

2 Answers

Why won't my excavator stop overheating?


Search Results

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    www.machinerylubrication.com/Read/680/hydraulic-overheating
    Overheating ranks No. 2 in the list of most common problems with hydraulic equipment. Unlike leaks, which rank No. 1, the causes of overheating and its ...

    Cat 320 overheating - Heavy Equipment Forums

    www.heavyequipmentforums.com/showthread.php?2828...overheating
    Mar 28, 2007 - 15 posts - ‎10 authors Anyone here have a problem with a Cat 320 overheating? ... that many heatingproblems in excavators are caused by hydraulic problems. 5T Excavator KX161-3 overheating
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Oct 14, 2015 | Cars & Trucks

1 Answer

Throwing error code 3173, even dealer didn't know. Machine idles fine, when hydraulics engage after it warms up, it dies.


not knowing what machine it is , I would suspect that the problem is in the control valve system or hydraulic pump
this is indicated by when you use something the hydraulic pump comes under considerable load and almost stalls the motor
That indicates that the pump is trying to drive 2 operations at the same time ( up/down or in/out or maybe a combination of all together ) that could be from a failed spool valve/s in the control unit or the gears in the pump are binding up from excessive wear on the shafts

Aug 30, 2015 | Cars & Trucks

1 Answer

Chain motor losing drive under load,not stalling engine,pretension nut is tight ???chain motor is making a hydraulic squeal when chain stops under load?


Is the chain too tight..!? You should be able to roll the chain forward using a combi spanner without too much effort and it should stop and not run on..
Other reasons a saw will lose power under load are as follows; plugged air filter, blocked fuel filter, tank vent, air leak between tank and pump, pump diaphragm damaged, main jet blocked.

Mar 04, 2015 | Garden

2 Answers

330 excavator with a c9 cat engine, heavy SMOKE


Why did you do all of the engine work? Due to the same problem? Have you ran an ET on it to check for codes ?

Feb 25, 2010 | 2006 Lamborghini Diablo

1 Answer

Possible problem of slow movement of Hydraulic cylinder and Travel of Komatsu excavator


hi, have u checked ur fluid and filter, if so u need to check the pressure.
u can buy a normal guage and and get a bit of pipe made up to suit ur job.
you might be able to get away by increasing the spool valve. but if ran low on hydraulic then it is a new pump.

Aug 29, 2009 | Norscot Group/Cat Norscot Group 1/87 Ho...

1 Answer

19886 saab 900 convertible roof not working.


Hi David:

First, check the fuses for the hydraulic motor; if they're blown, replace and monitor (why did they blow? Perhaps an overload, or ...) These fuses are located in the engine bay on top of the fender by the front right wheel housing.

Next check the voltage supply to the top switch, possibly a loose connection or broken wire.

Also check relays C (raising top) and D (lowering top) under the rear seat.

Lastly check for voltage at the pump, also under the rear seat, when the switch is actuated, and that the voltage polarity reverses when the switch is actuated the other way (up or down).

After that, it's a hydraulic/mechanical problem. Check the fluid level in the pump reservoir (use SAAB fluid to top up if low) Fluid level should be at the upper marker with top down, and at the lower marker with top up.

Check behind the rear seat side panels that the piston shaft is still properly attached to the roof mechanism bracket at one end, and the piston itself is still firmly attached to the body. Look for any leakage from the system.

If all tests out OK and looks good under the rear seat and behind the side panels, then there is the possibility that the piston seals have failed and the fluid is just circulating around without activating the piston. Pistons are available (http://www.convertibletopguys.com/cgi-local/displaycat.cgi?cat=584 - scroll down) but the entire system should be removed to avoid getting hydraulic fluid on the interior.

However, that fact that you can operate the hood using the bypass valve (manually) would indicate that the hydraulics are likely OK, and that it's probably an electrical or mechanical problem.

Good luck!

Saabreur

Jun 09, 2009 | 1998 Saab 900

2 Answers

Hydraulics Pump not working


look around for a valve or a switch,and or button

Jan 08, 2009 | Plumbing

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