The scraper cutting edge is divided into three sections. The end sections (2) are double beveled and Hi-electro hardened. The sections are reversible, have one row of mounting holes and can be used on the right or left side. The center section (4) is double beveled and Hi-electro hardened. The section is reversible and has two rows of mounting holes, only one of which is used at a time. This section projects three inches beyond the lower edge of the end sections and is often referred to as a "stinger bit." The center section (4) is subject to more wear than the end sections (2) and therefore may be replaced separately when necessary. Replace cutting edges before they wear back even with the cutting edge support. Make the change as described in the topic, CUTTING EDGE REMOVAL AND INSTALLATION.
Routing bits are installed on each side of the cutting edge to protect the part of the bowl which receives the most wear. They are reversible and should be turned when only one edge is worn or replaced when both edges are worn.
Removal and Installation
Raise the bowl to full height and place blocks (3) under bowl. Raise the apron, place block (1) between apron side arm and bowl, stop the engine and remove disconnect switch key.
Do not remove the cutting edges or routing bits with the engine running. The use of blocks and removal of disconnect switch key will prevent personal injury in case of accidental starting of the engine and/or movement of hydraulic control lever.
CUTTING EDGE REMOVAL
1-Wooden block. 2-End sections. 3-Wooden blocks under bowl. 4-Center section.
ROUTING BIT REMOVAL
1-Wooden block. 2-Wooden blocks under bowl. 3-Routing bits.
Cutting Edge: Remove the bolts holding the cutting edges to the bowl; take off the cutting edge end sections (2) and center section (4). Clean the contacting surface of the cutting edge and bowl; turn the cutting edge sections end for end if one edge is worn, or replace them if both edges are worn; then position the new cutting edges. Install the bolts and securely tighten the nuts. After several hours' operation, again tighten these nuts.
Routing Bit: Remove the bolts holding the routing bits (3) to the bowl. It may be necessary to remove the bolts with a chisel or cutting torch. Turn the routing bit end for end if only one edge is worn or replace it if both edges are worn. Clean the contacting surfaces and install the routing bits, making sure to tighten the nuts securely.