Caterpillar Forklifts P3000-P7000 description of the catalogue:

Caterpiller Forklifts Service Manuals and Wiring Diagrams

Chassis & Mast
P3000 AT34-10121 to 30120
P3500 AT34-10121 to 30120
PC4000 AT34-60121 to 80120
P4000 AT35-10121 to 30120
P5000 AT35-10121 to 30120
P5500 AT36-10121 to 30120
P6000 AT13F-10121 to 30120
P6500 AT13F-60121 to 80120
P7000 AT13F-60121 to 80120