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Bobcat  > Skid Steers  > Re: Bobcat Hydraulic pressure error code  
 
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 Author Thread: Bobcat Hydraulic pressure error code
1320n12 is not online. Last active: 3/26/2009 8:07:13 PM 1320n12
Joined: 25 Mar 2009
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Bobcat Hydraulic pressure error code
Posted: 03/25/2009 07:55 PM
I have a Bobcat model 7753 that was made in 1993 Im gettting a Hydraulic Pressure code 3 Error can anyone help with what to check and how. Thanks The local service shop is not helping me at all.
Tazza is not online. Last active: 9/23/2014 2:41:32 PM Tazza
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Re: Bobcat Hydraulic pressure error code
Posted: 03/26/2009 01:05 AM
It could be as simple as a bad pressure sender, is it a HP3 error? below the BOSS gauge there should be a list that shows what error 3 is, it may be open circuit which is usually a bad sender. Its located on the hydraulic filter head in the engine bay.

Bobcat 763 burntSadbut i'm working on it!, 04 S150 with air and a smooshed cab, S250 turbo.
skidsteer.ca is not online. Last active: 7/21/2014 8:31:40 PM skidsteer.ca
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Re: Bobcat Hydraulic pressure error code
Posted: 03/26/2009 06:17 AM

From a earlier post

Boss Codes

AF = air filter, 3 = wire not connected

Codes are as follows

ECL engine coolant level

EC engine coolant temp

EP engine oil pressure

ES engine speed

AF air filter

H  Hydrostatic fluid temp

b    Battery (show on display in Lower Case)

FUEL   fuel level

HF  Hydraulic Filter

HP  Hydraulic Fluid pressure

All these codes will be followed by a number, not all numbers apply to all codes

Example 1 is the engine shutdown code but there is no FUEL 1 or No AF1 because these are not serious failures.

Numbers are as follows

1 Shutdown engine in 30 seconds   

2 Warning

3 wire not connected

4 wire shorted

5 High sensor voltage

6 Sensor no signal

7 Sensor out of range

If you see some sort of jiberish on the display you likely have a bad ground .

There are also  code number  1.1    2.1 and 2.2

EC has a 1.1 shutdown and a 2.1 Warning code

ES hase a 2.1 warning code

b has a 2.1 warning bad battery and a 2.2 Warning battery voltaage

Therte are up to 4 relays

starter, glow plugs, park brake , not sure on 4th , I think it the fuel shut off soliniod on the Kubota engine models


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1320n12 is not online. Last active: 3/26/2009 8:07:13 PM 1320n12
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Re: Bobcat Hydraulic pressure error code
Posted: 03/26/2009 06:24 AM
Yes it is an HP3 code. Is there a way to check this sensor? I want to make sure its a bad sensor and not a wire problem.
Tazza is not online. Last active: 9/23/2014 2:41:32 PM Tazza
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Re: Bobcat Hydraulic pressure error code
Posted: 03/26/2009 12:51 PM
Its a 3 wire sender, so i'm not sure you can just bridge it to know if its good or bad. I don't think the sender is that expensive, around the $30-$40 mark i believe.

Bobcat 763 burntSadbut i'm working on it!, 04 S150 with air and a smooshed cab, S250 turbo.
1320n12 is not online. Last active: 3/26/2009 8:07:13 PM 1320n12
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Re: Bobcat Hydraulic pressure error code
Posted: 03/26/2009 03:32 PM
Your saying its a 3 wire sender and the repair shop says its a 2 wire sensor and it cost almost $70. Now Im confused.
Tazza is not online. Last active: 9/23/2014 2:41:32 PM Tazza
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Re: Bobcat Hydraulic pressure error code
Posted: 03/26/2009 04:52 PM
Well the sender i used on my 753 with a BOSS system uses a 3 wire switch, as does my 763 and 751 with BICS and it was 30-40 USD.....

Bobcat 763 burntSadbut i'm working on it!, 04 S150 with air and a smooshed cab, S250 turbo.
1320n12 is not online. Last active: 3/26/2009 8:07:13 PM 1320n12
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Re: Bobcat Hydraulic pressure error code
Posted: 03/26/2009 08:07 PM
Where is this 3 wire switch located?
Fishfiles is not online. Last active: 2/23/2014 3:44:14 AM Fishfiles
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Re: Bobcat Hydraulic pressure error code
Posted: 03/26/2009 11:31 PM
There were 3 maybe 4 different sensors used on 7753, 763and 753 for the hydraulic pressure , depending if you had Boss or Base , some were one wire , for a while there were even adapter wiring pigtails that need to be installed on certain serial number situations when replacing a sensor , the dealer should know what you need if they did a good job on researching the serial number break -----this code seems to be a real problem on that machine , sometimes I find it's an oil thickness problem , 10 w30 in the hydraulic tank will make it go off , I have not used 10w30 in the hydraulic tank for probally 20 years now on anything I do unless the customer whats it , and that change started for me with that code problem , you might try cleaning out the snubber , which is a fitting that the sensor is scerwed into , it's like porous rock and trash may be in it , it could be a wiring problem but also it could be a controller problem --------the sensor is to the right of the hydraulic filter , between the filter and the wall , I doubt you have three wires , probally 2 with a weather tight plug
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