1.20      PROBLEM: Delay in building up system pressure
1.21	Compressor	Defect in cylinder head inlet / del. value Damaged piston / rings Loose drive belt (for belt driven compressor.)	Overhaul cylinder head.* Carry out major overhaul.* Adjust/replace the belt to get required tension.
1.22	Hose, pipes & fittings	Leak in circuit between compressor delivery and system protection valve inlet.	Check lines & all joints. Rectify/replace hose assy if damaged.
1.23	Unloader valve with TI	Leak through top cover & exhaust spout.	Overhaul assembly.*
1.24	Sensing reservoir	Leak through weld joints or drain valve	Rectify weld joint. Replace defective drain valve.
1.25	System protection valve	External leak from the valve assembly.	Overhaul assembly.*