Toro Owners Manual - 1 
From inside (document excerpt):
Riding Greensmaster Cutting Units with Dual Point Adjustment (DPA)* ® 8 BLADE DPA CUTTING UNITS, 04610 11 BLADE DPA CUTTING UNITS, 04611 TRACTOR HEIGHT OF CUT (HOC) RANGE REEL WELDMENT REEL BEARINGS MAINTENANCE REEL DRIVE FRAME AGGRESSIVENESS BEDKNIFE BEDKNIFE ADJUSTMENT FRONT & REAR ROLLERS GRASS SHIELD TOTAL WEIGHT These cutting units will mount on any Toro riding Greensmaster. Cutting height is adjusted on front roller by two vertical screws and held by two locking cap screws.
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Bench HOC range is .062-.297 ” (1.67.5 mm). With high HOC kit, range is .285-1 ” (7.3-25.4 mm). Effective HOC may vary depending on turf conditions and bedknife installed. Reels are 5 ” (13 cm) in diameter, 21 ” (53.3 cm) in length. High carbon steel blades are welded to 5 stamped steel spiders, and heat treated to RC 48-54 hardness. The reel is ground for diameter and concentricity, and backgrind. Two double row, self-aligning ball bearings, 30 +/-.1 mm inside diameter slip fit onto reel shaft with lock nut. Multiple seal barriers on both sides of bearing for added protection. Reel position maintained by a wave washer with no adjusting nut. No grease zerks, sealed bearing design eliminates daily maintenance. The reel weldment shaft is a 1.375 ” (35 mm) diameter tube with drive inserts permanently pressed in both ends. A replaceable floating coupler with an internal eight tooth spline is factory installed on the right end, and held in place by a snap ring. The floating coupler may be moved to the other end when the cutting unit is used on the GR3250-D front right position. Precision machined, die-cast aluminum cross member with two bolt-on die-cast aluminum side plates. Aggresiveness stays constant throughout the life of the reel. Patented design. Replaceable single edged, high carbon steel bedknife austempered to RC 48-55, fastened to a machined cast iron bedbar with 13 screws. Tournament bedknife is standard. Dual screw, indexed “click ” adjustment to the reel; detents corresponding positively to .0007 ” (.018 mm) bedknife movement for each position. Front: Aluminum Wiehle,® 2.5 ” (6.4 cm) diameter with sealed bearings and through-shaft. Option between full, narrow-spaced and wide-spaced roller. Rear: Steel full, 2 ” (5.1 cm) diameter with sealed bearings and through-shaft. Non-adjustable shield with adjustable cut-off bar to improve grass discharge from reel in wet conditions. 8-blade: 72 lbs. (32.7 kg) with aluminum Wiehle Roller. 11-blade: 75 lbs. (34.1 kg) with aluminum Wiehle Roller. DPA CUTTING UNIT OPTIONS Part No. 93-4262 94-4263 93-4264 94-6392 63-8600 Description Micro-Cut Bedknife Tournament Bedknife Lo-Cut Bedknife (1/8) Hi-Cut Bedknife Fairway Bedknife Height of Cut Range (REC) .062-.188 ” (1.6-4.8 mm) .125-.375 ” (3.2-9.5 mm) .188-1.00 ” (4.8-25.4 mm) .312-1.00 ” (7.9-25.4 mm) .375-1.00 ” (9.5-25.4 mm) SERVICE BEDKNIVES FULL ROLLER NARROW-SPACED WIEHLE Model 04620. Set of three (3) 2.5 ” +/-.03 ” (6.35 cm) diameter, with sealed bearings and through-shaft (steel tube). Model 04621. Set of three (3) 2.5 ” +/-.03 ” (6.35 cm) diameter, .20 ” +/-.03 ” spacing with sealed bearings and through-shaft (aluminum). Model 04622. Set of three (3) 2.5 ” +/-.03 ” (6.35 cm) diameter, .93 ” +/-.03 ” spacing with sealed bearings and through-shaft (aluminum). Includes a set of three (3) grooming reels, 2.375 ” (6.03 cm) diameter, .028 ” (.71 mm) thick heat treated spring steel, operating at 3,000 RPM. Powered by a six (6) rib Poly-V-Belt. Model 04630. Kit contains three (3) left-hand side drive assemblies for GR3050/3100/3150. Model 04631. Kit contains two (2) left-hand drive assemblies and one (1) right-hand side drive assembly for GR3250-D. Model 04640. Includes three brush assemblies. Fits GR3050/3100/3150 cutting units. Model 04641. Includes three brush assemblies that can be mounted for left-hand or right-hand side drive.