Mitch500
Active member
- Joined
- Feb 4, 2024
- Messages
- 30
Hello fellow forum members,
Just wanted to introduce myself, I'm a new member with a 1995 853. I acquired this bobcat about a week ago in hopes to help my around my acreage with yard work, garden stuff, snow removal and hopes to re surfaces the gravel road at my cabin.
I bought the 853 at a non operable auction and got it for a good deal I believe. I'm not a noob with wrenching, I've rebuilt a couple Mercedes diesel sprinter motors , do all my own mechanics on cars and trucks. But I am a noob to the Skid steer world and hydraulics for that matter.
The other day when I got the machine home I got to work and begun preparing to get the motor started, But not before reading the service manual a couple times to familiarize myself with the machine. One thing I noticed right away was someone added a walbro autopulse inline fuel pump. Upon reading the manual that part was not factory and someone installed it, which lead me to believe maybe something was wrong with the pickup tube in the tank or ball valve on the end of the tube. Whoever installed it decided to steal 12v from the fuel cutoff switch attached to the injection pump which was causing the switch to rapidly shut off and on while the key was in the on position (not running). I decided to disconnect that connection and installed new fuel filter Wix (old filter was incorrect arrow in blue) and bled the air via touching the positive lead on the pump to the starter +. This allowed me to bleed the filter of air and also bleed air from injection pump. Here's a pic of the pump circled in green which i plan to replace with hand pump.
After that, I had to reconnect the starter signal wire as I believe someone cut it in the auction yard to see if the motor would spin as the machine came with now key. Original auction photos show the wire connected. This was easy so I just soldered and heat shrink it together.
Next I replaced the oil and filter. The filter that came with it was bobcat OEM filter and said Rotella t6 and was changed in 2021, no hour recorded but was nice to see a OEM filter and a good oil begin used. I drained the oil which was dark but nothing out of the ordinary. I replaced it with 7.6l of Rotella t6 and a Wix cross-reference filter.
Now it was time to start the motor, I plugged the block heater in for about a hour, jumped in the cab and held the glow plug button for about 10-15sec. I used a flat head screw driver to turn the ignition and to my suprise the machine fired up instantly. Was slightly roughy to start as it was -10 outside but the idle smoothed out pretty quickly and was running great.
After that I let it idle for a few mins checking for leaks or strange sounds, I did notice a belt chirp on the accessory side of the motor which lead to to find a broken alternator belt tensioner bracket. Since then I've welded it together. see pic below
After running for a few mins I raised and lowerd the boom. Great it works. Now I tried to move forward and back, this worked great too. No strange pump noises or jerky-ness in the hydraulics. I then bumped the engine theottle up and the hydraulic warning light illuminated on the overhead control board so I shut it down immediately. Here's a pic of the light that came on:
I checked the fluid level In the reservoir prior to starting and I added 5 liters of fluid. I let the machine sit over night thinking the fluid was hot and that's what was giving me the warning. The next day I fired up the machine and the light was on instantly which led me to believe the temp wasn't the problem. Upon reading the warning light illumination can be 1. Fluid temp 2. Charge pressure 3.Plugged filters 4. bad sensor
I've since placed a order for 2 new Wix hydraulic filters which I'll change out and see if that solves it. Start with the easiest first.
I then raised the cab of the machine and upon Inspecting the inside it looks as if it's never been cleaned. Lots of dirt, fluid and debris inside. I also notice I have a active leak coming from the tops of the hydraulic pump where the steering levers connect. I've read there is a sleeve and o-rings to replace there. The other active leak was coming from the hydraulic drive motor that's behind the missing covers between the wheels. Lots of sand and junk in there mixed with fluid laying in that compartment.
My next step is to give the machine a good cleaning , is it ok to pressure wash the hydraulic pumps and everywhere under the raised cab? More so a good degreasing and fanning of the pressure washer being careful not to infiltrate water into electrical connectors and such. I'm sure my drains are plugged as there's a inch of junk in those compartments behind the wheels. Also about washing under the main hydraulic pump between the fuel tank and hydro pump? Is there worry of getting water in the fuel tank?
Pic of dirty hydraulics compartment.
So just a recap on questions:
1. Dash light for hydraulics. What to check for?
2. Washing under the cab, anything I should watch out for before I give er.
Thanks again and looking forward to this project and responses from members.
Just wanted to introduce myself, I'm a new member with a 1995 853. I acquired this bobcat about a week ago in hopes to help my around my acreage with yard work, garden stuff, snow removal and hopes to re surfaces the gravel road at my cabin.
I bought the 853 at a non operable auction and got it for a good deal I believe. I'm not a noob with wrenching, I've rebuilt a couple Mercedes diesel sprinter motors , do all my own mechanics on cars and trucks. But I am a noob to the Skid steer world and hydraulics for that matter.
The other day when I got the machine home I got to work and begun preparing to get the motor started, But not before reading the service manual a couple times to familiarize myself with the machine. One thing I noticed right away was someone added a walbro autopulse inline fuel pump. Upon reading the manual that part was not factory and someone installed it, which lead me to believe maybe something was wrong with the pickup tube in the tank or ball valve on the end of the tube. Whoever installed it decided to steal 12v from the fuel cutoff switch attached to the injection pump which was causing the switch to rapidly shut off and on while the key was in the on position (not running). I decided to disconnect that connection and installed new fuel filter Wix (old filter was incorrect arrow in blue) and bled the air via touching the positive lead on the pump to the starter +. This allowed me to bleed the filter of air and also bleed air from injection pump. Here's a pic of the pump circled in green which i plan to replace with hand pump.
After that, I had to reconnect the starter signal wire as I believe someone cut it in the auction yard to see if the motor would spin as the machine came with now key. Original auction photos show the wire connected. This was easy so I just soldered and heat shrink it together.
Next I replaced the oil and filter. The filter that came with it was bobcat OEM filter and said Rotella t6 and was changed in 2021, no hour recorded but was nice to see a OEM filter and a good oil begin used. I drained the oil which was dark but nothing out of the ordinary. I replaced it with 7.6l of Rotella t6 and a Wix cross-reference filter.
Now it was time to start the motor, I plugged the block heater in for about a hour, jumped in the cab and held the glow plug button for about 10-15sec. I used a flat head screw driver to turn the ignition and to my suprise the machine fired up instantly. Was slightly roughy to start as it was -10 outside but the idle smoothed out pretty quickly and was running great.
After that I let it idle for a few mins checking for leaks or strange sounds, I did notice a belt chirp on the accessory side of the motor which lead to to find a broken alternator belt tensioner bracket. Since then I've welded it together. see pic below
After running for a few mins I raised and lowerd the boom. Great it works. Now I tried to move forward and back, this worked great too. No strange pump noises or jerky-ness in the hydraulics. I then bumped the engine theottle up and the hydraulic warning light illuminated on the overhead control board so I shut it down immediately. Here's a pic of the light that came on:
I checked the fluid level In the reservoir prior to starting and I added 5 liters of fluid. I let the machine sit over night thinking the fluid was hot and that's what was giving me the warning. The next day I fired up the machine and the light was on instantly which led me to believe the temp wasn't the problem. Upon reading the warning light illumination can be 1. Fluid temp 2. Charge pressure 3.Plugged filters 4. bad sensor
I've since placed a order for 2 new Wix hydraulic filters which I'll change out and see if that solves it. Start with the easiest first.
I then raised the cab of the machine and upon Inspecting the inside it looks as if it's never been cleaned. Lots of dirt, fluid and debris inside. I also notice I have a active leak coming from the tops of the hydraulic pump where the steering levers connect. I've read there is a sleeve and o-rings to replace there. The other active leak was coming from the hydraulic drive motor that's behind the missing covers between the wheels. Lots of sand and junk in there mixed with fluid laying in that compartment.
My next step is to give the machine a good cleaning , is it ok to pressure wash the hydraulic pumps and everywhere under the raised cab? More so a good degreasing and fanning of the pressure washer being careful not to infiltrate water into electrical connectors and such. I'm sure my drains are plugged as there's a inch of junk in those compartments behind the wheels. Also about washing under the main hydraulic pump between the fuel tank and hydro pump? Is there worry of getting water in the fuel tank?
Pic of dirty hydraulics compartment.
So just a recap on questions:
1. Dash light for hydraulics. What to check for?
2. Washing under the cab, anything I should watch out for before I give er.
Thanks again and looking forward to this project and responses from members.