The weight of a Massey Ferguson 285 tractor is approximately 5,500-6,000 pounds.
Since the 1977 model serial numbers start at: 9A254045, and the 1978 model numbers start at: 9A276935, my best guess would be that your MF-285 is a 1977 model. Source page: http://www.tractordata.com/farm-tractors/000/7/7/775-massey-ferguson-285.html
A good hydraulic fluid for a 285 Massey Ferguson is typically an oil meeting the specifications of ISO 46 or a universal tractor transmission fluid (UTTF) that complies with Massey Ferguson's requirements. Look for fluids that offer good anti-wear properties and thermal stability to ensure optimal performance. It's also important to check the owner's manual for any specific recommendations regarding hydraulic fluid types and viscosity.
A Perkins 4 cylinder diesel engine comes standard with a Massey Ferguson 285 tractor. Other engine specifications include: 2000 RPMs, 17:5:1 Compression, 4.5 in x 5 in Bore/Stroke and 5.2 L displacement. The engine has a Measurement of 12.5"W x 16"H. You can read about this at http://www.alibaba.com/product-free/104938109/Massey_Ferguson_MF_285_tractor_gear.html
The Massey Ferguson 285 typically uses a multi-grade hydraulic oil, specifically a UTF (Universal Tractor Fluid) that meets the specifications of MF-1139. It's important to choose a hydraulic oil that provides good lubrication and protection for both the hydraulic system and the transmission. Always refer to the owner's manual for specific recommendations regarding oil viscosity and specifications.
To remove the hydraulic pump from a Massey Ferguson 285 tractor, first ensure the tractor is turned off and properly secured. Drain the hydraulic fluid to avoid spills and disconnect the hydraulic lines from the pump. Then, remove any mounting bolts securing the pump to the tractor and gently pull the pump away from its housing. Be sure to consult the service manual for specific details and torque specifications related to your model.
You can purchase a manual for your tractor online. The online store is located here: http://www.ssbtractor.com/tractor_manual_display.cgi?m=Massey%20Ferguson&o=MF%20285.
to the left of the gear lever is a cap with a 1 1/16 bolt head on it. remove that cap and fill there. To check the level the is a small dipstick under the lift on the frame.
This model is an older model and to buy one doesn't require too much money and would not be considered an expensive tractor. The general price for this model now would be between $5,000-$10,000 which really isn't too much.
There are many online used tractor part websites, vintage tractors are becoming more popular. I suggest http://www.tractorpartsinc.com because they have a substantial selection of Masey Ferguson parts.
You slide down the the bottom half of the front the bit with the see through window until it is clear of the unit the batteries can the be removed and replaced. then re slide up to close
5% of 285= 5% * 285= 0.05 * 285= 14.25