821028A 2 Mercury CABLE (3-MALE/1-FEMALE CONNECTOR)

Axial Drive
Note: Additional inertia must not be added to the PTO shaft without consulting your Caterpillar dealer.
Illustration 1 g00747102
Typical axial drive for the PTO (1) PTO shaft (2) Taper lock flange (3) Flexible coupling (4) Taper lockThe naturally aspirated 3054B Marine engine and the turbocharged 3054 Marine engine use full engine power for the axial drive. The naturally aspirated 3056 Marine engine uses full engine power for the axial drive. Refer to Table 1 for the maximum capability of the axial drive for the 138 kW (185 hp) turbocharged aftercooled 3056 Marine engine. Refer to Table 2 for the maximum capability of the axial drive for the 153 kW (205 hp) turbocharged aftercooled 3056 Marine engine.
Table 1
Maximum Capability of the PTO by using the Axial Drive for the
138 kW (185 hp) Turbocharged Aftercooled 3056 Marine Engine    
Engine RPM     Available Power of the Axial Drive at the Given RPM    
1000 RPM    
59 kW (79 hp)    
1200 RPM    
79 kW (106 hp)    
1400 RPM    
73 kW (98 hp)    
1600 RPM    
60 kW (81 hp)    
1800 RPM    
70 kW (94 hp)    
2000 RPM    
79 kW (106 hp)    
2200 RPM    
89 kW (119 hp)    
2400 RPM    
98 kW (131 hp)    
2500 RPM    
103 kW (138 hp)    
Table 2
Maximum Capability of the PTO by using the Axial Drive for the
153 kW (205 hp) Turbocharged Aftercooled 3056 Marine Engine    
Engine RPM     Available Power of the Axial Drive at the Given RPM    
1200 RPM     Full power    
1400 RPM    
80 kW (107 hp)    
1600 RPM    
62 kW (83 hp)    
1800 RPM    
62 kW (83 hp)    
2000 RPM    
84 kW (113 hp)    
2200 RPM    
93 kW (125 hp)    
2400 RPM    
104 kW (140 hp)    
2500 RPM    
110 kW (148 hp)    Belt Drive
Note: The maximum power for the PTO is limited by the belts.Note: Additional inertia must not be added to the PTO shaft without consulting your Caterpillar dealer.
Illustration 2 g00747103
Three groove pulley for the PTO (5) Three groove pulley (6) Taper lock (7) Allen head screw
Illustration 3 g00747106
Two groove pulley for the PTO (8) Two groove pulley (9) Taper lock (10) Allen head screwRefer to Table 3 for the maximum capability of the belt drive for the naturally aspirated 3054B Marine engine and the turbocharged 3054 Marine engine. Refer to Table 3 for the naturally aspirated 3056 Marine engine. Refer to Table 3 for the turbocharged aftercooled 3056 Marine engine.
Table 3
Maximum Capability of the PTO by using the Belt Drive for the 3054 and the 3054B Marine engine and the 3056 Marine engine    
Engine RPM     Available Power of the Belt Drive at the Given RPM (1)    
Entire range of engine rpm    
6 kW (8 hp)    
( 1 ) The maximum recommended power per belt is 2 kW (2.7 hp). Multiple accessories for the belt drive should be installed on both sides of the engine. This will minimize side loads of the engine. If a drive pulley or a coupling is installed on the engine that is not supplied by Caterpillar, then refer to the OEM recommendations for use. However, ensure that the value for the maximum recommended power per belt is not exceeded.