CONCRETE PUMPS   X R - 5 3 6 X R - 6 3 6 X R - 6 4 2 Volume 36 50 60 Piston Face PSI 900 800 800 Stroke 36 36 42 Bore 5 6 6 S-Tube Inlet 5 6 6 S-Tube Discharge 5 5 5 Diesel Engine 60 80 100 Axles 1 1 1 Tires 15" 15" 15" Length 162" 162" 175" Width 70" 70" 70" Weight 4000 lbs. 4300 lbs. 4500 lbs. XR-536 60-HP Pump Lightweight but incredibly sturdy 36 cyph output, 900 psi pressure Designed for shotcrete and small slab pours Great for 3/8" pea rock and 3/4" structural mixes Available with an optional remixer XR-636 80-HP Pump Compact-size unit for versatile use 50 cyph output, 800 psi pressure Excellent for pumping small slabs Very effective with pea rock and shotcrete Agitator comes standard XR-642 100-HP Pump Heavy-duty unit for general purpose use 60 cyph output, 800 psi pressure Ideal for slabs on grade or multi-story slabs Outstanding on tough flat work pours Agitator is standard equipment XRT Truck Module is available and can be custom-built to fit your truck.