RG 140.B
OPERATION For work in loose soil, articulate the frame to keep the tandems on the hardest possible soil. With the circle centered under the frame, position the center of the blade slightly offset from the front tire. Pitch the blade forward until the top of the blade is in alignment with the center of the front tire. Position the blade such that the material cut is unloaded at the center of the machine, between the tandems. Slightly angle the front wheels toward the material discharge.
Do a cleaning pass to remove material from the channel, throwing it over the roadway and spreading as required. TERRACING - CONTOUR LINES One of the most important applications of motorgraders in agriculture is terracing with contour lines to restrain and distribute storm water over farming fields, for increased productivity and preventing erosion of hillsides. This work consists of cutting "V" shapped channels according to the contour lines of the terrain, spaced 10 to 100 meters from one another, except the longer spacings are for lower grades and the shorter one for steeper grades. These channels serve also to distribute liquid fertilizers by gravity. CUTTING A FLAT BED CHANNEL Opening a flat bed channel is a continuation of the "V" shaped channel cut.
During the first pass, in 1st or 2nd gear, cut just the necessary amount of material to lay out the alignment of the channel. During the second pass, locate the wheels inside the channel and at a speed slightly higher than the first pass, in order to keep a wall slant of 3:1. Discharge of the cut material must be kept between the tandems. A cleaning pass is required. Move the circle and extended blade right behind the column of material, to prevent material from sliding into the channel. The corner of the blade should be positioned between the tandens, with the blade slightly angled and pitched forward, to facilitate rolling of the material. All channel cut passes should be with the differential lock on, in 2nd or 3rd gear. To cut channels with slopes from 1,5:1 to 2:1, move the circle and the blade against the bank. Align the corner of the blade with the center of the rear tire. Position blade end outside the front tire and pitch the blade slightly forward. Orient the wheels toward the "V" channel in order to deposit material from the slope into the channel.
With the circle centered under the frame in straight ahead position, position the end of the blade behind the outer edge of the front tire. Angle the blade until the opposite end reaches the width and depth of the channel desired (with front scarifires it is possible to position the blade at 90o, if necessary). Pitch the blade slightly forward, in order to spread the material over the bed of the channel. This pass should be done in 1st or 2nd gears (with differential locked, if fitted). During the following pass, push the material out of the channel and over the roadbed. To do this, move the circle and the blade away from the heap and angle the blade sufficiently to prevent the material from going back into the channel. Keep the end of the blade close enough to the front tire to prevent lumps of material from rolling into the channel. During the following pass spread the material smoothly from the edge of the road toward the middle.
Read the SAFETY RULES on the preceding pages for machine protection and the safety of employees
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