Česká Zbrojovka Cz 550 Medium, Magnum Instruction Manual

							CZ 550 Medium, Magnum  -  INSTRUCTION MANUAL 28 MAINTENANCE INSTRUCTIONS 
 
Stripping for Cleaning - Disassembly 
1. Remove the magazine. With the magazine box version, open the floorplate and remove the cartridges. 
2. Shift the safety to its SAFETY-OFF position in order that the bolt can be manipulated. 
3. Open the bolt, and after depressing the bolt stop (Fig. 10), pull the bolt rearwards out of the receiver. 
 
Disassembly of the Bolt 
BEFORE BOLT DISASSEMBLY CHECK FOR YOURSELF THAT THE CARTRIDGE CHAMBER IS EMPTY. 
Cock the firing mechanism by opening the bolt, move it slightly backwards and close it again. Press the disassembly 
catch (Fig. 4) and keep it depressed, while at the same time open the bolt and move it partially rearwards with the other 
hand. Unscrew the bolt sleeve together with the firing pin assembly and as already described above pull the rest of the bolt 
rearwards out of the receiver. 
CAUTION: 
Do not strip your firearm any further. If you assume that your firearm requires adjustment or repair, entrust this work to 
a competent gunsmith in a specialized workshop! 
 
Cleaning the Rifle 
Clean the rifle 
- Each time you use it. 
- If you get your rifle wet. 
- As soon as possible after shooting. 
- At least once a year in a temperate climate. 
- As often as once a month in a tropical climate, or other demanding environment.  
						

							CZ 550 Medium, Magnum  -  INSTRUCTION MANUAL 29 Cleaning the Barrel Bore and the Cartridge Chamber 
If the firearm has not been fired or if only a few cartridges have been fired, clean the barrel bore and cartridge chamber 
by a clean patch attached to a cleaning rod. Repeat the cleaning, changing patches, until the last patch comes out clean. 
When the barrel bore is very dirty, apply a gun cleaning solution using cleaning brush. Let the solvent act for about 10 
minutes (this time may vary depending on the solvent agent being used). Then thoroughly scrub out the barrel bore. 
Subsequently, dry the barrel bore and cartridge chamber with a clean patch and check that all powder residues or fouling 
have been removed. If necessary, repeat this procedure. 
The cleaning rod and the brush must be inserted into the barrel bore from the chamber, to prevent wear or damage to 
the muzzle. Pass the brush all the way through the barrel bore before reversing the movement. If you try to change 
directions with the brush in the barrel, the brush could stick. 
 
Cleaning of Other Rifle Parts 
Other parts of the rifle can be cleaned with a dry cloth, old toothbrush, copper bristle brush, or a wooden scraper. 
Preserving oil or paraffin oil can be used for proper cleaning. Never use the agent designed for barrel bore cleaning! 
These solutions could remain in the joints, and after some time could cause corrosion. Check that cloth particles or brush 
bristles have not become lodged in any part of the rifle. 
The maintenance of the stock can be carried out with a dry cloth or by some furniture-polishing product. 
 
Preserving 
When the barrel bore, cartridge chamber, and all accessible parts are clean and dry, wipe these parts with a cloth 
soaked in gun oil or apply the oil in a spray. Remove all excess oil. 
Before shooting always wipe the barrel bore dry. At very low temperatures remove the oil from all accessible parts or 
apply a lubricant prepared especially for these conditions. 
Use thick preserving agents for example, preserving grease only for long-term storage in demanding climate 
environments, and before any use of the rifle, it must be thoroughly removed from all parts of the firearm.  
						

							CZ 550 Medium, Magnum  -  INSTRUCTION MANUAL 30 TROUBLESHOOTING, CAUSES AND REMEDIES 
 
If your firearm is properly used and maintained, malfunctions will rarely occur. However, if such a situation does occur 
please observe the following instructions. 
CAUTION - if a malfunction occurs, the possibility of an unintentional discharge is substantially increased. For this 
reason, when clearing malfunctions, observe the Safety Instructions already mentioned above. Keep the rifle pointed in 
a safe direction, do not turn the rifle against your body or anyone else’s. Do not place your hands in front of the barrel! 
 
Malfunction Possible Cause Remedy A round has not 
been fed into the 
chamber. Magazine is not fully inserted or is damaged. 
The rifle or cartridges are fouled (dirty). Insert magazine properly or change magazine. 
Clean the rifle and cartridges and wipe them dry or 
as the case may be slightly lubricate. Misfire Defective cartridge. 
Firing Pin hole fouled (dirty) or improper 
lubrication agent used during low temperatures 
conditions. Follow the Safety Instructions according to point 20. 
Disassemble and clean the firing pin or use low 
temperature lubricant. A shot sounds 
“weak“. The primer has been activated but no powder 
load was inside the cartridge case. Unload the rifle and check that the bullet is not 
lodged in the barrel. Any subsequent shot could 
cause damage to the barrel! The spent case 
has not been 
ejected. Cartridge chamber, extractor or ammunition 
dirty or unsuitable lubricant in low temperature 
environment Clean and wipe the rifle dry or eventually lubricate 
lightly with a suitable agent. Use clean and new 
ammunition. If you cannot clear away any malfunction in the manner described above, entrust the rifle to a competent gunsmith for 
inspection and repair.  
						

							CZ 550 Medium, Magnum  -  INSTRUCTION MANUAL 31 ILLUSTRATION AND LIST OF PARTS  
						

							CZ 550 Medium, Magnum  -  INSTRUCTION MANUAL 32 1 Barrel 
2 Rear Sight 
3 Front Sight 
4 Front Sight Base 
5 Front Sight Base Screw 05 
6 Front Sight Base Screw 03 
7 Rear Sight Base Screw 
8 Front Sight Detent 
9 Detent Spring 
10 Pin, Front Sight Detent 
11 Front Sight Cover 
12 Receiver 
13 Bolt 
14 Bolt Handle Knob 
15 Extractor 
16 Extractor Collar 
17 Firing Pin 
18 Firing Pin Spring 
19 Support, Firing Pin Spring 
20 Nut, Firing Pin Spring 
21 Cocking Piece 
22 Pin, Firing Pin Nut 
23 Cap 
24 Bolt Sleeve 
25 Disassy Catch 
26 Disassy Catch Spring 
27 Disassy Catch Pin 
28 Disassy Catch Plunger 29 Plunger Spring 
30 Plunger Pin 
31 Safety 
32 Safety Pawl 
33 Safety Pawl Spring 
34 Roller 
35 Safety Pawl Pin 
36 Sear 
37 Sear Stop 
38 Sear Spring 
39 Sear Pin 
40 Bolt Stop 
41 Bolt Stop Spring 
42 Safety Pin 
43 Retaining Plate 
44 Ejector 
45 Ejector Pin 
46 Ejector Spring 
47 Ball 
48 Trigger Housing 
49 Trigger 
50 Trigger Lever 
51 Trigger Lever Pin 
52 - 
53 Adjusting Screw, Set 
Trigger 
54 Set Trigger Lever 
55 Spring, Set Trigger Lever 56 Pin 
57 Retaining Ring 
58 Adjusting Screw (B) 
59 Spring, Trigger Pull 
60 Adjusting Screw, Trigger 
Pull (A) 
61 Locking Nut 
62 Adjusting Screw, Trigger 
Overtravel (C) 
63 Locking Nut 
64 Nylon Pin (2x) 
65 Trigger Mechanism 
66 Screw 
67 Spring Washer 
68 Stock 
69 Butt Plate Spacer 
70 Butt Plate 
71 Screw, Butt Plate 
72 Butt Plate Plug 
73 Swivel Wood Screw 
74 Sling Swivel 
75 Swivel Screw 
76 Swivel Screw Washer 
77 Swivel Assembly 
78 Trigger Guard - Box 
Version 
79 Box Shell 
80 Floor Plate 81 Floor Plate Pin 
82 Floor Plate Latch 
83 Spring, Floor Plate Latch 
84 Pin, Floor Plate Latch 
85 Magazine Box Spring 
86 Magazine Follower 
87 Front Spacer 
88 Frame Screw, Front 
89 Rear Spacer 
90 Frame Screw, Rear 
  
106 Trigger Spring 
107 Stay 
108 Reinforcer Screw * 
109 Spring Washer * 
110 Washer * 
111 Reinforcer Nut * 
112 Rear Sight Base 
113 Rear Sight Blade 200m 
114 Rear Sight Blade 300m 
115 Rear Sight Spring 
116 Rear Sight Spring Screw 
117 Rear Sight Blade Pin 
118 Locking Screw 
 
* Medium 2x, Magnum 1x  
						

							CZ 550 Medium, Magnum  -  INSTRUCTION MANUAL 33 TECHNICAL SPECIFICATIONS 
 
Model Medium Magnum Version Standard 
Lux FS Battue Standard 
Lux 
Safari Calibers 7 mm Rem. Mag. 300 Win. Mag. 
9,3 x 62 * 9,3 x 62 7 mm Rem. Mag. 300 Win. Mag. 
9,3 x 62 * 7 mm Rem. Mag. 300 Win. Mag. 
375 H&H Mag. 
416 Rem. Mag. 
416 Rigby 
458 Win. Mag. Overall Length [mm] 1135 1055 1095 (1055*) 1180 Barrel Length [mm] 600 520 560 (520*) 635 Sights Radius (Mechanical Sights) [mm] 420 340 380 (340*) 495 Weight (Empty Magazine) [kg] 3,3 3,1 3,2 (3,1*) 4,2 Magazine Box, Capacity [cartridges] 3 (5*) 5 3 (5*) 3 - 5 Trigger Pull, Adjustment Range [N] 12 ÷ 22 12 ÷ 22 12 ÷ 22 12 ÷ 22   
						

							CZ 550 Medium, Magnum  -  INSTRUCTION MANUAL 34 LIST OF ILLUSTRATIONS 
 
1. The names of basic parts. 
2. Magazine box floor plate opening. 
3. The three positions safety in SAFETY-OFF (fire) mode. 
4. The close-up of activated cocking indicator and bolt disassembly catch. 
5. Trigger adjusting screws (A - trigger pull, B - trigger slack, C - trigger overtravel). 
6. Set trigger adjusting screw. 
7. Rear sight with fixing screws (H for horizontal, V for vertical shift). 
8. Battue - Ramp Sights. 
9. Express sight with V notches on the blades. 
10. The bolt stop close-up. 
 
 
 
 
 
 
 
 
 
 
 
 
The Company, reserves the right to make any changes it thinks necessary to improve its models or to meet any requirements of 
manufacturing or commercial nature.