If you’re a proud owner of a Bobcat 843, you know the power and versatility this machine brings to your job site. However, being one of the oldest skid-steer loaders, I’ve seen a few problems that often annoy Bobcat 843 owners.
So, what are those Bobcat 843 problems? From the day I have been working on Bobcat 843s, I found owners mostly complaining about malfunctioning drive control, fuel starvation, engine overheating, and lift or tilt issues.
Now, whether you’re planning to buy a second-hand Bobcat 843 or already have owned one, you need to eliminate the issues. So, join me as I uncover the causes behind these issues and explore the solutions that will keep the machine roaring with power.
Overview of Bobcat 843 Skid Steer Loader
Bobcat unveiled the 843 skid-steer loader in 1981, and its production spanned over a decade until 1992. Despite the passage of time, this remarkable machine still dominates numerous work environments, thanks to its killer specs.
So, I’m going to present its technical details, as understanding this fundamental information is crucial before dealing with this powerful equipment.
| Engine Configuration | 58.0 HP (43.3 kW), 153.9 cu. in., 4-cylinder |
| Cooling System | Liquid cool |
| Fuel | Diesel |
| Lifting Capacity (35% Tipping) | 1150 lb. (521.6 kg) |
| Lifting Capacity (50% Tipping) | 1700 lb. (771.1 kg) |
| Operating Weight | 6500 lb. (2948.4 kg) |
| Tipping Load | 3400 lb. (1542.2 kg) |
| Hydraulic Pump Capacity | 15.4 GPM (58.3 L/min) |
| Fuel Tank Capacity | 21.9 gal (83.0 L) |
| Engine Oil Capacity | 2.4 gal (9.0 L) |
| Coolant Capacity | 5.5 gal (21.0 L) |
| Transmission | Hydrostatic, four-wheel drive. |
| Max Travel Speed | 6.3 mph (10.1 km/h) |
Key Features and Benefits Of Bobcat 843
In the previous section, I gave you an overview of the essential specifications of the Bobcat 843. Now, I’m going to shed light on the notable features and benefits of this little beast.
Hopefully, knowing these features and benefits will help you in getting a complete grasp on what the Bobcat 843 is capable of.
- A compact yet powerful machine capable of tackling lots of lifting jobs in tight spaces.
- Features a universal hitch design that facilitates quick swapping of different heads for versatile jobs.
- The optional high-flow design allows working on even tougher projects.
- Well-judged and user-friendly instrument panel
- Liquid cooling system that prevents engine overheating efficiently.
- Fully enclosed cabin with heating and air conditioning facility.
What Are The Common Bobcat 843 Problems?
Frankly speaking, issues in the Bobcat 843 skid-steer loader are not as horrifying and widespread as in some other models like the Bobcat 753, 763, etc.
Still, you can’t escape from having a single issue with such old heavy equipment. Over the years, I’ve seen Bobcat 843 owners are mostly worried about the following problems:
- Drive Control Issue
- Fuel starvation
- Engine overheating
- Malfunctioning Lift and Tilt Mechanism
4 Solutions To Most Common Bobcat 843 Issues
I’ve pointed out the 4 most common issues regarding the Bobcat 843 skid-steer loader. Now, it’s time to give the right solution to release the burden of worries from your head. So, move on.
#-1 Drive Control Issue
The drive control system in Bobcat 843 is notorious and often experiences issues. From my personal experience, I’ve seen most owners complain about the left-forward drive control.
In such a case, the left forward control doesn’t work at all, while the backward movement seems fine. As I researched, I came to know that the issue is also common in Bobcat 73s and 74s.
Based on my observation, I suspected the hidden filter installed in these loaders. I said “hidden” since most owners overlook this filter, which becomes full of junk and dirt over time.
At that time, the pump struggles to get enough power and fails to move forward, especially when going uphill. So, here is what you should do to get rid of the issue:
- Step 1: Go to the fitting and find the #9 location. There you will see a 40-micron filter.
- Step 2: Take the filter out and check if it has too much dirt.
- Step 3: Spray parts cleaner on the filter and blow dry air on it.
- Step 4: Reinstall the filter. Hopefully, this will work. However, if cleaning the filter seems ineffective, you must replace it.
#2- Fuel Starvation
Since Bobcat introduced their skid-steer loaders back in 1980-99, the fuel starvation issue has panicked countless owners. This issue is also prominent in Bobcat 843s.
Till now, more than fifty owners have come to me with such an issue. However, they have experienced different symptoms such as sudden loss of power, engine shut off, difficulty starting, and so on.
But the core issue is centered on the fuel supply system. In this case, a damaged or clogged fuel filter or fuel intake tube can be the main reason. Let me show you how to get the troubleshooting done:
- Step 1: Just above the fuel filter housing, there is a screw. The screw is known as the primer screw and you have to locate it first. This screw is designed with a hole on its side for fuel to spray out, eliminating the need for complete removal.
- Step 2: Simply loosen the screw and utilize the primer bulb to fill up the filter.
- Step 3: Reconnect everything and check if there is fuel present afterward. Additionally, consider loosening or removing the fuel cap, as it could be obstructed and require ventilation.
- Step 4: Lastly, detach the bulb and blow compressed air through the line until it looks completely clean.
#3- Engine Overheating
The Bobcat 843 also has a liquid cooling system with an integrated temperature gauge. However, I have seen some owners complain about the temperature gauge showing an elevated temperature reading on the instrument panel.
Many people overlook the reading unless they find the engine is shut down out of the blue. So, let me clarify this. Bobcat 843 is equipped with two inspection panels located in the lower air shroud.
They’re basically like little windows that give you access to clean up all the gunk that might be clogging up your hydraulic oil cooler and radiator’s air intake side.
Now, if you neglect this and let dust or debris build-up, the engine and hydraulics will start getting overheated under the collar.
To eliminate this issue, I recommended removing these inspection panels and conducting a thorough cleaning periodically.
#4- Malfunctioning Lift and Tilt Mechanism
From the beginning of my journey in this field, I have seen the majority of Bobcat skid-steer loader owners come to me regarding issues with the lift or tilt mechanism.
This is also common for Bobcat 843. From my personal experience, I’ve seen the lift control in this machine cease working sometimes.
The issue became more complex when I noticed the tilt works fine when there’s no bucket on it. However, luck doesn’t favor when the bucket is on.
The whole thing made me puzzled about where to start my diagnosis. After spending a few hours on this, I found a way to go systematically. Here is what I did:
- Step 1: First things first, make sure that the seat bar is all the way down and hooked up with release arms that let you use your foot controls.
- Step 2: Sometimes, the auxiliary hydraulic lever can move towards or away from your thigh, and it can even lock in place. Just make sure it’s right in between.
- Step 3: Once you’ve done that, lift the cab and check out if everything’s connected properly and those poly bushings are still doing their job well.
- Step 4: If everything looks good so far, then go ahead and move on to checking out that control valve.
- Step 5: Inspect hoses for any signs of wear or damage, such as cracks or leaks. Damaged hoses should be replaced promptly to maintain proper hydraulic functioning.
FAQs
I wish I had covered almost everything you should know regarding common Bobcat 843 problems. Yet, it won’t surprise me if you’re curious to learn something more. For this, the following FAQ section is provided.
Where is the serial number on a Bobcat 843?
Knowing the serial number is crucial while repairing or replacing any part. To find the serial number in Bobcat 843, go to the rear portion of the machine. Find the left support arm; the VIN number will be there.
Can I repair my Bobcat 843 myself if it encounters problems?
While some minor maintenance tasks can be done by owners themselves (such as changing filters or checking fluid levels), complex repairs should be left to trained professionals.
How do I fix hydraulic system problems in my Bobcat 843?
To fix hydraulic system problems in your Bobcat 843, start by checking the hydraulic fluid level and ensuring it is within the recommended range. Inspect all hoses and fittings for leaks or damage, and check the condition of the filters.
How often should I change the engine oil in my Bobcat 843?
It is recommended to change the engine oil in your Bobcat 843 every 250 hours of operation or annually, whichever comes first.
Final Words
I have made every effort to provide clear explanations and simple solutions for the most prevalent problems encountered with the Bobcat 763.
While these problems can be frustrating and costly to fix, it is important to remember that regular maintenance and proper operation can greatly minimize the occurrence of these issues.
Read also: 5 Common 743 Bobcat Problems (Specs & Solutions Included)
Meet Emily, a true garden lover who has a passion for all things nature. With a deep understanding of plants and lawns, Emily’s love for gardening started at a young age, spending her summers tending to her grandparents’ garden.