Summers Rockpicker - Manual (Page 11)

SECTION 2 - OPERATION AND MAINTENANCE
FIELD OPERATION
CAUTION: NEVER run machine into a buried rock in an effort to dig rocks. Pry rock loose first. This machine is not
designed to dig rocks. To do so will void the warranty.
ADJUSTMENTS FOR PICKING: MODEL 700 ROTARY ROCKPICKER
In typical field conditions, lower picking rake and check that frame is level. Adjust by resetting hitch piece (8D0720)
height. The picking rake should be set at a depth to skim rocks off the ground. Adjust Depth Bolts (8R6300, Page 3-3)
to set picking depth. Tractor and reel speed should be such that rocks are thrown to the upper rear section of bucket.
Field conditions should be reasonably dry and firm.
IMPORTANT: Reel speed should not exceed 35 RPM.
MAINTENANCE AND SERVICE
MODEL 700 ROTARY ROCKPICKER
1. Grease 16 grease fittings on rockpicker DAILY.
2. Seasonally, disassemble, clean and repack wheel hub bearings.
3. Check set screws on reel periodically for tightness.
4. The gear case is filled at the factory with 90 weight gear lube. Maintain gear lube at approximately 2/3 full (to top
plug when level) with 90 weight gear lube. Change gear lube after first 50 hours and every 1000 hours of operation
thereafter.
5. Tighten nuts of rake retaining rods if rake tines become loose.
TIRE INFLATION / WHEEL BOLT / NUT TORQUE
Recommended tire inflation pressures and wheel bolt/nut torque are as follows:
TIRE PRESSURE HUB WHEEL NUT TORQUE
16.5L X 16.1 Tire 35 psi 812 - 8 Bolt 240 ft. lb.
ADJUSTING CUSHION VALVE RELIEF PRESSURE ON MODEL 700 HYDRAULIC DRIVE ROCKPICKER
The cushion valve relief pressure is set at the factory at 2000 psi on all hydraulic drive rockpickers. A setting lower than
this can cause inadequate reel torque. To check, follow this procedure:
1. Determine tractor hydraulic system relief pressure by installing pressure gauge at remote outlet.
2. Next, install a tee in the hydraulic line leading from the right side of the flow control valve to the left side of the
cushion block. Referring to the illustration on page 3-4, install tee between left fitting 8J6030 of cushion block and
hydraulic hose 8N4060.
3. Install pressure gauge into tee. Activate tractor hydraulic system so reel turns in picking direction, and check pres-
sure with reel stalled. To stall reel insert a large post between a batt and rake.
WARNING: Stand clear of reel at all times while tractor engine is running.
4. Pressure should read about 2000 psi, however, pressure here will never be higher than tractor pressure read in step
#1. If stalled reel pressure is less than pressure in step #1 and less than 2000 psi contact your Summers dealer.
2-3