Subject: Improved Hydraulic Cylinder Mounting Bushings and Pins for Second Conveyor and Net Feed Valve Adjustment
MODELS AFFECTED: SR, SRA AND AR SERIES HARVESTERS
On some models, excessive wear can occur at the rear conveyor hydraulic cylinder lower mounting perch (Figure 1).
Figure 1--Cylinder Lower Mount
Excessive wear in this area will allow the conveyor to travel too far downward and possibly result in net feed valve failure.
To check for excessive wear, raise and lower the rear conveyor while observing for play where the cylinders mount to the frame. Also, fully lower the conveyor and check the spring deflection as the leaf spring activates the net feed valve. (Figure 2).
Figure 2--Net Feed Valve (1) and Leaf Spring (2)
The leaf spring should deflect approximately ½ in. (12.7 mm) when the conveyor is fully down. If spring deflection exceeds ½ in. (12.7 mm), the cylinder mounts may be excessively worn. Be aware, however, that excessive deflection can also be caused by a misadjusted net feed valve.
NOTE:
The leaf spring that activates the net feed valve must not contact the conveyor frame during operation or valve damage will occur. Correct adjustment is essential for proper net feed operation.
New spring steel bushings and mounting pins are available to correct this situation. The pins are cross-drilled and tapped to accept a grease zerk.
The bushings consist of four ¾ in. (19.05 mm) bushings and two 1 in. (25.4 mm) bushings. Contact Bucyrus Equipment Company Inc (800-330-0857) to obtain the parts necessary to perform this update.
- ¾ in. bushing--part No. 100075075 (four required)
- 1 in. bushing--part No. 100075100 (two required)
- Pin--SC219-2 (two required)
WARNING
Only disconnect one cylinder at a time and engage the cylinder stop (Figure 3) on the opposite side to prevent the conveyor from falling.
Figure 3--View Showing Cylinder Safety Stop Engaged
1. Raise the rear conveyor as necessary to disconnect the lower mount.
2. Remove the pin and lower the cylinder stop on the opposite side that you are working on. See Figure 3. Secure the stop in place using the pin.
3. Remove the lower mounting pin and bushings from the cylinder and frame perch.
4. Install the short bushings into each mounting lug on the cylinder. Install the long bushing into the frame mounting perch. Note that the bushings are a slight interference fit.
5. Attach the cylinder to the frame and install the mounting pin with the grease zerk facing outward.
6. Repeat this procedure for the remaining cylinder.
7. Next, check net feed valve adjustment as follows:
a. Slowly lower the rear conveyor while observing leaf spring deflection as the spring activates the net feed valve.
b. Spring deflection should be approximately ½ in. (12.7 mm) with the rear conveyor in the fully down position.
c. If adjustment is necessary, loosen the jam nut and turn the adjustment bolt (2, Figure 2) in or out as necessary to obtain the correct spring deflection. Securely tighten the jam nut and recheck the adjustment.
d. With the conveyor fully lowered, turn on the rear conveyor and make sure the net feed rollers activate normally.
- Proper Procedure To Tie Down The Machine For Transport
- Netting Tangled Around Wheel Motor Shafts
- Control Lever Rod End Lubrication
AFFECTED MODELS: ALL M-SERIES BIG-ROLL INSTALLERS
Securing the installer
When securing a big-roll installer to a trailer, never tie down using a strap placed over the fuel and hydraulic tanks (Figure1).
Figure 1--DO NOT strap the machine down using the fuel and hydraulic tanks.
The tanks are not designed to hold the weight of the machine. It is possible to crack the tanks at their mounting tabs if they are used to secure the installer.
In addition, the chains under the operator's platform (Figure 2) are designed to help balance the machine when lifting it using a forklift.
Figure 2--To prevent
damage to the platform, do not use the chains to secure the machine on a
trailer or truck.
Do not use the chains to secure the machine or the platform will be damaged.
The correct method to secure the installer is using ratcheting straps. Place one strap through the D-ring on the rear of the machine (Figure 3).
Figure 3--D-ring on
rear of machine.
To secure the front of the machine, place a strap over the front tires (Figure 4), or raise the roll lift arms and place a strap across the main frame (Figure 5).
Figure 4--The front of the machine can be secured using a ratcheting strap placed over the tires
Figure 5--If necessary, raise the roll lift arms and secure the machine using a ratcheting strap across the main frame as shown.
To be certain the machine is securely tied down, it may be helpful to place a strap around the roll lift frame and tighten it securely, pulling against the strap attached to the D-ring in the rear. See (Figure 6).
Figure 6--If
necessary, place a strap around the roll lift frame and tighten it securely.
Netting tangled around motor shafts
We have noticed some machines in the field with sod netting wrapped tightly around the wheel motor shafts. If the netting is allowed to remain on the motor shafts, it will soon destroy the shaft seals resulting in hydraulic fluid leakage and damaged motors.
The best time to remove the netting is before it is packed tightly around the shafts. Inspect the unit each day and remove all netting wrapped around the shafts. If necessary, remove the wheel to more easily remove the netting.
Rod end lubrication
Periodically lubricate the control lever rod ends to ensure smooth operation. To lubricate the rod ends, first remove the four screws that secure the lever boot, then remove the boot. See Figure 7.
Figure 7--Remove the boot to access the control lever rod ends.
Figure 8--Lubricate
the control lever rod ends using light oil such as WD-40 (or equivalent).
Lubricate the rod ends using suitable aerosol oil. Operate the control lever forward and backward and side to side. Make sure the control lever operates smoothly. Reinstall the boot and four screws when finished.
If hydraulic fluid leakage is noted at the area around the cavity plug, the plug may be loose causing the O-ring to fail. The cavity plug is located on the bottom of the flow control valve body assembly. Figure 1 shows the cavity plug with the flow control valve body removed and inverted.
Figure 1--Cavity Plug
If necessary, contact Bucyrus Equipment Company Inc. (800-330-0857) to obtain replacement O-rings (part No. 3-916) and special sealant (part No. 0471767) used to repair the leakage. We recommend replacing the O-rings on all three cavity plugs.
To replace the O-rings, proceed as follows:
1. Thoroughly clean the area around the cavity plug to prevent contaminating the hydraulic system.
2. Remove the cavity plug using a 1-1/2 in. wrench or socket.
3. Remove and discard the O-ring (Figure 2).
Figure 2--Cavity Plug O-Ring
4. Clean the threads on the plug and in the flow control valve body. Do not allow any contamination to enter the valve body or cavity plug.
5. Install a new O-ring on the cavity plug and apply a light coat of sealant to the threads.
6. Install the cavity plug into the valve body and tighten to 140 ft.-lbs. (190 N.m) using an accurate torque wrench. Allow the sealant to cure for 10-15 minutes before resuming operation.
The sprocket lugs on the rubber belts are reinforced with metal clips. Belt and sprocket damage will occur if any of the clips are excessively worn, damaged or missing. To prevent damage to the rubber belts and sprockets make sure that all of the clips are securely installed and in acceptable condition.
Periodically inspect the rubber belts on the rear conveyor. Worn clips are best seen looking at the underside of the belt. Replace any clips that are excessively worn, damaged or missing. Call Bucyrus Equipment Company (800-330-0857) for replacement clips and installation tool.- Clips--part No. 04-149-01
- Installation tool--part No. TCI900
The chop linkage is secured using 0.75 in. bolts. See Figure 1. These bolts must be sufficiently loose to allow the chop linkage to pivot without binding. Therefore, if the cutter heads are not running, the chop mechanism can leak downward until the chop blades are touching the ground.
Washers
- Bellville Washers--part No. 0125805
- Bolts--3/4-16 X 4.5 in. (fine thread)
To perform this upgrade, remove the original nut and bolt. Install the fine-thread bolt making sure the flat washers are in place between the chop-off stationary frame and links. Install the Bellville washers with the concave sides facing together onto the bolt, then the nut and tighten it snug. The nuts should be just tight enough to hold the chop blades up, but still allow the chop mechanism to pivot smoothly without binding.