Opening of Bids - One (1) or More New Positive Displacement Hydro-Excavating Machine with Tandem Axle Cab & Chassis Spec U - Best Equipment Co., Inc.

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f [i TORQUE W/ MOLY PASTE W/OIL (CAPSCREW (CAPSCREW GEAR THREADS) THREADS) FT -LB$ (Kg-m) FTLBS {Kg-m) SIZE 8 450 63 650 91 Table 4 Gear Torque 10. Installing drive gear (4) -Install a long, metal feeler gauge between the impeller lobes at the fronts as shown in Figure 6. Feeler gauge thickness to be a middle value from Table 5 for fronts. Align the gear so the tooth match marks agree with the driven gear, then install washer (30), washer (69) and capserew (31). Tighten light- ly with a small wrench, then check front and back clearances against Table 5 for each 450 position. Both fronts should be about the same and backs should about equal and within the specified range in Table 5. Adjust gear position, if necessary, then insert the corrected feeler gauge and wedges and use a torque wrench to tighten the gear capscrews to the torque specified in Table 4. Remove wedges and rotate the drive shaft by hand to make sure there are no gear tight spots or im- peller contacts. Caution! Keep fingers away from impellers and gears. 11. Units with oil coolers - The gear end oil cooler is a formed copper tubing and is held in positon by the tank fittings installed in the gear box. During re -installation make sure that the cooler does not interfere with the gears or the slinger. The drive end covers have % " NPT con- nections for water cooling. 12. Install gearbox (3) with gasket (7) and capscrews (26). 13. Install drive end cover (5) and gasket (10) with spring pins (17) in place. Install capscrews (62). Check seal bore for concentricity with shaft using an indicator; reposi- tion pins if necessary. Apply sealant on outer diameter of the seal (33). Lubricate seal lip and install it with lip facing inward using care to avoid scratching seal on keyway. 14. Install breather plug (21) in the gear end headplate and breather plugs (73) in the drive end headplate. 15. Replace oil drain plugs at the bottom of the oilers and refill drive ends and gear sump with proper grade of oil as discussed under lubrication. 16, Install drive sheave or coupling half and install blower, refer to Installation Instructions. BLOWER ORIENTATION The unique removable feet feature of 800 RCS blowers per- mit field modification of blower mounting by repositioning blower feet. (Refer to Fig.10). Three blower mounting positions are possible: 1. Vertical mounting, horizontal air flow, drive shaft on top, discharge on left. 2. Horizontal mounting, vertical air flow, drive shaft on left, bottom discharge. 3. Horizontal mounting, vertical air flow, drive shaft on right, top discharge. Changing from vertical to horizontal - bottom discharge. 1. Remove oiler assembly from the drive end. 2. Place blower on its discharge flange, block properly as required. 3. Remove lifting brackets and feet. 4. Install feet on bottom cylinder lugs and lifting brackets on top cylinder lugs. 5. Place blower on its feet on a flat surface. Loosen feet bolts, level feet and tighten feet bolts. Feet bolts (44) and lifting bracket bolts are to be torqued to 85 ft-lbs. 6. Remove the sight glass and install it in the lower center hole. Remove the breather from the side of the head plate to the top of the head plate. Apply thread sealant on sight glass and plugs, close all opened up holes in the gearbox and the headplates. 7. Remove drive (5) and driven covers Mal. 8. Turn the driven cover 9011 so that the oiler holes are on the bottom. Install the oiler on the right hand side. 9. Remove drive seal (33) from the drive end cover and discard it. It should be replaced with a new seal. In- stall drive end cover. Indicate seal bore with respect to the drive shaft, run out must not be greater than .002 TIR. Re -drill pin holes (17) using 114 " drill. Install pins (17). Double cheek end cover bore run out. Apply lubricant on seal (33) lip and sealant on seal outer diameter. Install seal (33). 10. Install the oiler on the left hand side of the drive cover. 11. Remove breathers (73) from the drive end head plate and install them on top of the head plate. Plug the head plate holes previously occupied by the breathers. Changing from vertical to horizontal - top discharge: The general procedure is the same as above, except set the blower on the inlet flange and relocate the feet and the lifting brackets. Changing from horizontal to vertical. Install eye bolts in the top flange. Lift the unit up and relocate feet and the lifting brackets. Place blower on its feet and use the general procedure as above. Note that on the drive end head, 900, '/a ", elbows will be required to locate the breathers vertically up. 13