TP 800 is made of 3 TPs.

TP 801 – Basic Level (Working Hydraulics l)  – 574161 (no basic hydraulic package – TP 501 is required);
TP 802 – Advanced Level (Hydrostatic Steering Systems)– 574162;
TP 803 – Advanced Level (Working hydraulics ll) – 574163.

TP 801 is the basic Mobile Hydraulics package, the rest is supplementary to TP 801.

If you buy only the TP 801 or TP 801 + TP 802, the adequate pump is 8064373.
If you buy TP 803 as well, then the only pump for the entire set up is 8073527.