Toro 3100 manual Bedknife Replacement and Grinding, 10 13 Rev. D Dual Point Adjust Cutting units

Bedknife Replacement and Grinding

Removal

1.Remove bedbar from frame (see Bedbar Removal).

2.Remove screws from bedbar using a socket wrench and bedknife screw tool (see Special Tools). Discard screws. Remove bedknife from the bedbar (Fig. 13).

3.Use scraper to remove all rust, scale and corrosion from bedbar surface before installing bedknife.

Replacement

1.Make sure bedbar threads are clean. Use new screws. Apply clean SAE 30 oil to the screws before installing.

IMPORTANT: Do not use an impact wrench to tight- en screws into the bedbar.

2.Using a torque wrench and bedknife screw tool, tighten screws to a torque of 200 to 250 in–lb (22 to

28Nm). Use a torquing pattern working from the center toward each end of the bedknife (Fig. 14).

3.Install bedbar to frame (see Bedbar Installation).

Grinding

Since there can be variations in the mounting surface of the bedbar, a new bedknife will not be perfectly flat after it is installed. Because of this, it is necessary to backlap or grind a new bedknife after installing it to the bedbar. Follow the existing angle that was ground into the bed- knife and grind only enough to make sure the top surface is true (Fig. 15).

1.Remove bedbar from the cutting unit (see Bedbar Removal).

Note: When grinding, be careful to not overheat the bedknife. Remove small amounts of material with each pass of the grinder.

2

1

3

		Figure 13
1.	Screw	3. Bedknife
2.	Bedbar

13 11 9 7 5 3 1 2 4 6 8 10 12

Figure 14

Top Face
Relief Angle	Remove
	Burr
	Front
	Face
Front Angle

2. Use Toro Service Training Book, Sharpening Reel	Figure 15
and Rotary Mowers (part no. 80300SL) for bedknife
grinding information.

Bedknife Grinding Specifications

Bedknife relief angle	3_ (see Fig. 15)
Front Angle	13_
Front Angle Range	13_ to 17_

NOTE: Relief angle is 7o for special "extended" bedknives

3.Reinstall bedbar to cutting unit (see Bedbar Installa- tion).

Greensmaster 3100 Page 10 - 13 Rev. D Dual Point Adjust Cutting units