Toro 4100-D service manual Adjustable Fitting Fig, Groundsmaster 4100--D Hydraulic System

Adjustable Fitting (Fig. 8)

1.Make sure all threads and sealing surfaces of fitting and component port are free of burrs, nicks, scratches or any foreign material.

2.As a preventative measure against leakage, it is rec- ommended that the O--ring be replaced any time the connection is opened.

3.Lightly lubricate the O--ring with clean hydraulic oil. Fitting threads should be clean with no lubricant applied.

4.Turn back the lock nut as far as possible. Make sure the back up washer is not loose and is pushed up as far as possible (Step 1 in Figure 9).

IMPORTANT: Before installing fitting into port, de- termine port material. If fitting is to be installed into an aluminum port, installation torque is reduced.

5.Install the fitting into the port and tighten finger tight until the washer contacts the face of the port (Step 2).

6.To put the fitting in the desired position, unscrew it by the required amount, but no more than one full turn (Step 3).

7.Hold the fitting in the desired position with a wrench and use a torque wrench to tighten the fitting to the rec- ommended installation torque shown in Figure 7. This tightening process will require the use of an offset wrench (e.g. crowfoot wrench). Use of an offset wrench will affect torque wrench calibration due to the effective length change of the torque wrench. Tightening torque when using a torque wrench with an offset wrench will be lower than the listed installation torque (see Using a Torque Wrench with an Offset Wrench in the Torque Specifications section of Chapter 2 -- Product Records and Maintenance).

8.If a torque wrench is not available, or if space at the port prevents use of a torque wrench, an alternate meth- od of assembly is the Flats From Finger Tight (F.F.F.T.) method. Hold the fitting in the desired position with a wrench and, if port material is steel, tighten the lock nut with a second wrench to the listed F.F.F.T (Step 4). If port material is aluminum, tighten fitting to 60% of listed F.F.F.T.

Size			F.F.F.T.
4	(1/4 in. nominal hose or tubing)		1.00 + 0.25
6	(3/8 in.)		1.50 + 0.25
8	(1/2 in.)		1.50 + 0.25
10		(5/8 in.)	1.50 + 0.25
12		(3/4 in.)	1.50 + 0.25
16		(1 in.)	1.50 + 0.25

Lock Nut

Back-up Washer

O-ring

Figure 8

Step 1 Step 3

Step 2 Step 4

Figure 9

Hydraulic System

Groundsmaster 4100--D Page 4 -- 7 Hydraulic System